Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
canh trinh » canh tranh, hanh trinh, canh tinh
dang cong » dung cong
thanh cac » hanh cac, thanh bac, tranh cac
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
trinh va » trinh van, trinh vat, trinh ve
thanh ca » thanh cha, thanh ha, thanh va

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 sach - canh trinh va ((thong cong) or (dang cong)) san ((thanh cac) or (thanh ca))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu sach - canh trinh va ((thong cong) OR (dang cong)) san ((thanh cac) OR (thanh ca)).
• Adding a wildcard symbol may retrieve word variants: theo chu sach - canh trinh va ((thong cong) or (dang cong)) san ((thanh cac) or (thanh ca))*.