Perhaps you should try some spelling variations:
thanh trung » thanh tung
hoc thieu » toc thieu, hoc hien
cong cong » cong dong, trong cong, dung cong
ho chieu » theo chieu, doi chieu, mot chieu
trung ha » trung hoc, trung tam, trung cap
cong dan » cong san, cong tan, huong dan
toan cao » toan tap
toan ban » van ban
ha cong » hoa cong, va cong, ha dong

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

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