Searched the web and found some examples with respective the 'correct' english translations. I still can't quite figure out what is the english equivalent of 務求 and 經越. Appreciate the help. Thanks!

務求做到良好的售前及售後服務。
Besides a diligently sales team.

這些化裝務求為觀衆帶來歡笑。
In other words, a clown acknowledges his audience.

該署不斷檢討防治蟲鼠的方法，務求提高工作成效。
The methodology used in pest control is continuously reviewed to enhance effectiveness and efficacy.

經越十七年的發展，已成爲新加坡最具規模及多元化的中菜餐飲集團。

"Wu4 Qiu2 務求" means in chinese "必須要求“ (bi4 xu1 yao1 qiu2) [English: "must; be sure to have something done"]

務求早日完成任務 (be sure to fulfil the task as early as possible)

Your translation as follow:

務求做到良好的售前及售後服務。
Be sure to do an excellent pre-sales and after-sales service.

這些化裝務求為觀衆帶來歡笑。
These make-up is sure to bring laughter amongst the audience

該署不斷檢討防治蟲鼠的方法，務求提高工作成效。
The associated department continuously reviews pest-control method, so as to enhance work effectiveness

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"Jin1 Yue4 經越" cannot be found as a word in chinese dictionary. I reckon, the closest chinese word to this should be "Jin1 Guo4 經過"[English: "as a result of; after going though an event; to pass through something"]

Translation:

經越十七年的發展，已成爲新加坡最具規模及多元化的中菜餐飲集團。
After going through 17 years of development, it has already become Singapore's largest and diversified restaurant group.