Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh qua » tranh cua, thanh qua, trinh qua
qua trong » quan trong, qua trinh, qua song
cong san » cong tac
san toan » van toan, dan toan, 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: ho ((hieu nganh) or (((chieu xanh) OR (chieu sang)))) - hanh tranh qua trong cong san toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu nganh) OR (((chieu xanh) OR (chieu sang)))) - hanh tranh qua trong cong san toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu nganh) or (((chieu xanh) OR (chieu sang)))) - hanh tranh qua trong cong san toan cao".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu nganh) or (((chieu xanh) OR (chieu sang)))) - hanh tranh qua trong cong san toan cao*.