Perhaps you should try some spelling variations:
thanh duong » thanh huong, thanh cuong, thanh vuong
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
duong va » duong van, dung va, luong va
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
toan cao » toan tap
toan ban » van ban
va hang » van hang, va nang, va lang

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 xanh - thanh duong va hang ((cong dan) OR (cong tan)) ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh duong va hang ((cong dan) OR (cong tan)) ((toan cao) OR (toan ban))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - thanh duong va hang ((cong dan) OR (cong tan)) ((toan cao) or (toan ban))*".