Perhaps you should try some spelling variations:
trong tac » trong cac, trong tan, trong tuc
tuong tac » cong tac, luong tai, tuong lai
tong cong » trong cong, cong cong, dung cong
theo chu » theo chieu, cho chu, chao chu
cong san » cong tac
chu han » chu van
san ran » san van, san roman, van ranh
ran cau » van cau, ban cau, can cau

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 han - hanh ((trong tac) or (tuong tac)) tong cong san ran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu han - hanh ((trong tac) OR (tuong tac)) tong cong san ran cau.
• Adding a wildcard symbol may retrieve word variants: theo chu han - hanh ((trong tac) or (tuong tac)) tong cong san ran cau*.