Perhaps you should try some spelling variations:
hiem ngan » kim ngan, viem gan
trung vap » trung cap, trung van, trung lap
thanh cau » thanh chau, thanh mau, nhanh cau
hoc hiem » hoc hien, hoc thieu, hoc thiet
trung va » truong va, trang va, trung ha
cong van » cong vang, song van, cong tan
cong san » cong tac

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hiem ngan - hanh ((trung vap) or (trung va)) nhung ((cong van) or (cong san)) thanh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hiem ngan - hanh ((trung vap) OR (trung va)) nhung ((cong van) OR (cong san)) thanh cau.
• Adding a wildcard symbol may retrieve word variants: hoc hiem ngan - hanh ((trung vap) or (trung va)) nhung ((cong van) or (cong san)) thanh cau*.