Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
phuong van » phung van, phong van, phuong lan
doc hieu » toc thieu, hoc thieu, hoc hien
theo chu » theo chieu, cho chu, chao chu
tranh va » tranh van, trang va, trinh va
van toan » van tuan, van tan, van thanh
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: ((doc hieu) or (theo chu)) xanh - canh tranh va nhung phuong van toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (theo chu)) xanh - canh tranh va nhung phuong van toan cao.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (theo chu)) xanh - canh tranh va nhung phuong van toan cao*.