Perhaps you should try some spelling variations:
nhung phuong » dung phuong, truong phuong, bang phuong
nhu phuong » thu phuong, thi phuong, thu huong
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) OR (nhu 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) OR (nhu phuong)) dan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu xanh - thanh ((toan va) or (tan van)) ((nhung phuong) OR (nhu phuong)) dan toan cao".
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - thanh ((toan va) or (tan van)) ((nhung phuong) OR (nhu phuong)) dan toan cao*.