Perhaps you should try some spelling variations:
hieu truong » hieu tuong, vien truong, bieu tuong
thanh trung » thanh tung
hieu trong » hieu tuong, nhiem trong, nhien trong
hoc thieu » hoc hien
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than ban » thanh ban, toan ban, than man

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