Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
phuong dan » phuong danh, phuong doan, huong dan
tieu xanh » tieu danh, chieu xanh, dieu hanh
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
toan va » doan va, tran van, toan ban
tan van » tran van, tang van, luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu xanh - thanh ((toan va) or (tan van)) nhung phuong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - thanh ((toan va) OR (tan van)) nhung phuong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - thanh ((toan va) or (tan van)) nhung phuong dan toan cao*.