Perhaps you should try some spelling variations:
thanh tung » thanh cong
cong thanh » dong thanh, cong trinh, truong thanh
dan trinh » dan tinh, van trinh, hanh trinh
vap nhung » va nhung, ve nhung, voi nhung
khoa dan » khoa dang, hoa dan, khoa can
tung vap » tung va, trung van, tuong vao
cong tan » cong tac, cong san, cong ty
than cap » thanh lap, thanh cac, than cua
khan cap » khan ap, khoan cam, phan cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: khoa dan trinh - thanh tung vap nhung ((cong tan) or (cong thanh)) ((than cap) OR (khan cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: khoa dan trinh - thanh tung vap nhung ((cong tan) OR (cong thanh)) ((than cap) OR (khan cap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "khoa dan trinh - thanh tung vap nhung ((cong tan) or (cong thanh)) ((than cap) OR (khan cap))".
• Adding a wildcard symbol may retrieve word variants: khoa dan trinh - thanh tung vap nhung ((cong tan) or (cong thanh)) ((than cap) OR (khan cap))*.