Perhaps you should try some spelling variations:
truong phuong » truong chung, truong trung, dung phuong
nhung phuong » dung phuong, nhu phuong, bang phuong
hanh trang » thanh trung, canh tranh, hanh trinh
doc hieu » toc thieu, hoc thieu, hoc hien
theo chu » theo chieu, cho chu, chao chu
trang va » tran van, hang va
lan toan » van toan, dan toan, lap toan
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 - hanh trang va ((nhung phuong) OR (truong phuong)) lan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (theo chu)) xanh - hanh trang va ((nhung phuong) OR (truong phuong)) lan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (theo chu)) xanh - hanh trang va ((nhung phuong) OR (truong phuong)) lan toan cao".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (theo chu)) xanh - hanh trang va ((nhung phuong) OR (truong phuong)) lan toan cao*.