Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
thanh cap » thanh lap, than cap, thanh ca
sinh san » trinh san, sinh va
anh tang » anh bang, anh dang, anh nang
cong ban » cong bang, cong san, cong tan
hanh cap » hanh cac, hanh cat, hanh cad
tang va » trang va, tang van, thang va

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((sinh san) OR (sinh vat)) - anh tang va nhung cong ban ((thanh cap) or (hanh cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((sinh san) OR (sinh vat)) - anh tang va nhung cong ban ((thanh cap) OR (hanh cap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((sinh san) OR (sinh vat)) - anh tang va nhung cong ban ((thanh cap) or (hanh cap))".
• Adding a wildcard symbol may retrieve word variants: hoc ((sinh san) OR (sinh vat)) - anh tang va nhung cong ban ((thanh cap) or (hanh cap))*.