Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
quan trong » gian trong
thi chieu » thi chien, thi hieu, thi hien
hanh nang » anh nang, ganh nang, hanh trang
hanh mang » nhanh mang, hanh trang, nhanh lang
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) or (thi chieu)) xanh - ((hanh nang) OR (hanh mang)) quan trong cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (thi chieu)) xanh - ((hanh nang) OR (hanh mang)) quan trong cong san toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (thi chieu)) xanh - ((hanh nang) OR (hanh mang)) quan trong cong san toan ban".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (thi chieu)) xanh - ((hanh nang) OR (hanh mang)) quan trong cong san toan ban*.