Perhaps you should try some spelling variations:
nhuong duong » chuong duong, phuong duong, tuong duong
duong manh » duong van
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
trang van » trang va, trong van, tang van
manh toan » thanh toan, anh tuan, tinh toan
tran van » luan van
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: theo hieu lang - hanh ((trang van) or (tran van)) nhuong duong manh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - hanh ((trang van) OR (tran van)) nhuong duong manh toan cao*.