Perhaps you should try some spelling variations:
thanh dung » thanh duong, thanh hung, hanh dung
thanh tung » thanh cong
thanh cau » thanh chau, thanh mau, nhanh cau
thanh chu » thanh chau, thanh cha, thanh thu
chi sach » chinh sach, chieu sach, co sach
qua cong » cua cong, qua song, va cong
dong tac » cong tac, dong tai, dong bac
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi sach - ((thanh dung) or (thanh tung)) qua cong dong tac ((thanh cau) or (thanh chu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi sach - ((thanh dung) OR (thanh tung)) qua cong dong tac ((thanh cau) OR (thanh chu)).
• Adding a wildcard symbol may retrieve word variants: doi chi sach - ((thanh dung) or (thanh tung)) qua cong dong tac ((thanh cau) or (thanh chu))*.