Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh trinh » canh tranh, hanh chinh
quan trong » gian trong
hoc thieu » toc thieu, hoc hien
hanh tang » hanh trang, hanh mang, hanh tung
anh tang » anh bang, anh dang, anh nang
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cau » 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: hoc thieu xanh - ((((hanh tang) OR (anh tang))) or (hanh trinh)) quan trong cong san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - ((((hanh tang) OR (anh tang))) OR (hanh trinh)) quan trong cong san toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - ((((hanh tang) OR (anh tang))) or (hanh trinh)) quan trong cong san toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - ((((hanh tang) OR (anh tang))) or (hanh trinh)) quan trong cong san toan cau*.