Perhaps you should try some spelling variations:
thanh trung » thanh tung
doc hieu » toc thieu, hoc thieu
cap dung » ap dung, chan dung, cach dung
cao dung » cao dang, cao dong, cao ung
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan ban » van ban

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

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