Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
canh trinh » canh tranh, hanh trinh, canh tinh
trinh xuat » trinh luat, trinh xuan, trich xuat
xuat thong » xuat thuong, suat thong, luat thuong
hoc thieu » toc thieu, hoc hien
van thanh » ban thanh, van tuan
van toan » van tuan, van tan, manh toan

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 - canh trinh xuat thong thong ((tinh toan) or (((van toan) OR (van thanh)))) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - canh trinh xuat thong thong ((tinh toan) OR (((van toan) OR (van thanh)))) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - canh trinh xuat thong thong ((tinh toan) or (((van toan) OR (van thanh)))) cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - canh trinh xuat thong thong ((tinh toan) or (((van toan) OR (van thanh)))) cau*.