Perhaps you should try some spelling variations:
trinh quang » tinh quang, trinh quan, trinh dung
tranh quang » tran quang, tinh quang, trinh quan
dang cong » dung cong
theo chu » theo chieu, cho chu, chao chu
chu sang » chu bang, thu sang, chieu sang
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan tap » toan ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu sang - hanh ((trinh quang) or (tranh quang)) dang cong tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu sang - hanh ((trinh quang) OR (tranh quang)) dang cong tac toan tap.
• Adding a wildcard symbol may retrieve word variants: theo chu sang - hanh ((trinh quang) or (tranh quang)) dang cong tac toan tap*.