Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
thi chieu » thi chien, thi hieu, theo chieu
hang hang » nang hang, cang thang, hung thang
trong san » trong cac, dong san, trong ca
cong san » cong tac
toan cau » toan cao, toan ban, toan tap
va dung » van dung, va duong, vat dung

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 (thi chieu)) xanh - hang hang va dung ((trong san) OR (cong san)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (thi chieu)) xanh - hang hang va dung ((trong san) OR (cong san)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (thi chieu)) xanh - hang hang va dung ((trong san) OR (cong san)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (thi chieu)) xanh - hang hang va dung ((trong san) OR (cong san)) toan cau*.