Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu hach » thien hach, chieu sach, thieu cac
hieu cach » hieu cac, chieu sach, hieu ca
va truong » van truong, xa truong, va thuong
trung va » truong va, trang va, trung ha
cong san » cong tac
chan cao » chan cho, chat cao, chay cao

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

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