Perhaps you should try some spelling variations:
thanh trung » thanh tung
thien hach » thien thanh, hien hanh
hoc thien » hoc hien, hoc thieu, hoc thiet
trung va » truong va, trang va, trung ha
va trong » va truong, va thong, va tuong
cong ban » cong bang, cong tan, cong dan
cong san » cong tac
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thien hach - thanh trung va trong ((cong ban) OR (cong san)) than cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thien hach - thanh trung va trong ((cong ban) OR (cong san)) than cao".
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - thanh trung va trong ((cong ban) OR (cong san)) than cao*.