Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
hieu xanh » chieu xanh, hieu manh, hieu nganh
tranh qua » tranh cua, thanh qua, trinh qua
dung cong » dung trong
thanh lap » thanh san, phan lap, thanh hai
doc hieu » toc thieu, hoc thieu, hoc hien
qua dung » quang dung, su dung, qua song
cong san » cong tac
toan cau » toan cao, toan ban, toan tai
toan tap » toan 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 xanh - hanh tranh qua dung cong san ((((toan cau) OR (toan tap))) or (thanh lap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - hanh tranh qua dung cong san ((((toan cau) OR (toan tap))) OR (thanh lap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - hanh tranh qua dung cong san ((((toan cau) OR (toan tap))) or (thanh lap))".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - hanh tranh qua dung cong san ((((toan cau) OR (toan tap))) or (thanh lap))*.