Perhaps you should try some spelling variations:
thanh tang » thanh thang, thanh trang, thanh tung
nhung cong » dung cong, thong cong, hang cong
hieu cach » hieu cac, chieu sach, hieu ca
hoc hieu » hoc thieu, hoc hien, doc hieu
ca nhung » cua nhung, cam nhung, va nhung
cong san » cong tac
phan cac » nhan cach, phan dau, phan lap
tang ca » tang cua, hang ca, tang ma

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 tang ca nhung cong san ((phan cac) or (phan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu cach - thanh tang ca nhung cong san ((phan cac) OR (phan tu)).
• Adding a wildcard symbol may retrieve word variants: hoc hieu cach - thanh tang ca nhung cong san ((phan cac) or (phan tu))*.