Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
hieu lang » chieu sang, hieu quang, nhieu tang
hanh hang » thanh hang, hang hang, hanh han
doan toan » doan tuan, doanh hoan, doan trang
manh toan » thanh toan, anh tuan, tinh toan
dan toan » van toan, dan than, xuan toan
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - hanh hang va nhung phuong ((doan toan) or (((dan toan) or (manh toan)))) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh hang va nhung phuong ((doan toan) OR (((dan toan) OR (manh toan)))) cao.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh hang va nhung phuong ((doan toan) or (((dan toan) or (manh toan)))) cao*.