Perhaps you should try some spelling variations:
phuong thao » phuong thuc
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh tang » hanh trang, anh tang, hanh mang
tang van » dang van, hoang van, trong van
van dung » van dong, xay dung, tin dung
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: theo chieu xanh - hanh tang van dung ((phuong thao) or (phuong phap)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu xanh - hanh tang van dung ((phuong thao) OR (phuong phap)) toan cau.
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - hanh tang van dung ((phuong thao) or (phuong phap)) toan cau*.