Perhaps you should try some spelling variations:
giai chieu » gioi thieu, gian hieu, gia hieu
truong cao » truong dai
nhung cong » dung cong, thong cong, hang cong
hai chieu » nhat chieu, pham chieu, thap chieu
trung cap » trung tam
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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

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