Perhaps you should try some spelling variations:
hoang phuong » bang phuong, doan phuong, hoc phuong
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
canh tran » canh tranh, hanh trang, banh trang
tran van » luan van
dan toan » van toan, dan than, manh toan
toan tap » toan ban

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 - canh tran van ((hoang phuong) or (hoang vuong)) dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - canh tran van ((hoang phuong) OR (hoang vuong)) dan toan tap*.