Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
trung ha » trung hoc, trung tam, trung cap
ha nhung » hoa nhung, hay nhung, pha nhung
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan cao » toan ban
toan tap » toan ban

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh trung ha nhung ((cong dan) OR (cong san)) ((toan cao) OR (toan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - thanh trung ha nhung ((cong dan) or (cong san)) ((toan cao) OR (toan tap))~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh trung ha nhung ((cong dan) or (cong san)) ((toan cao) OR (toan tap))*.