Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu hach » thien hach, chieu sach, hieu cach
van truong » tang truong, xuan truong, vien truong
trung van » truong van, trong van, trung va
hieu cac » hieu luc, hieu va, hieu van
cong dan » cong san, cong tan, cong dong
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 cac)) - thanh trung van truong ((cong dan) or (huong dan)) chan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu hach) OR (hieu cac)) - thanh trung van truong ((cong dan) OR (huong dan)) chan cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu hach) or (hieu cac)) - thanh trung van truong ((cong dan) or (huong dan)) chan cao*.