Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu cach » hieu cac, chieu sach, hieu ca
truong va » truong dai, truong cao, truong dao
hoc hieu » hoc thieu, hoc hien, doc hieu
trung va » trang va, trung ha, trung tam
dan than » dan chan, ban than, van than
van tuan » van quan, van ban, anh tuan

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

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