Perhaps you should try some spelling variations:
cong vuong » cong luong, cong huong, hong vuong
hieu lang » chieu sang, hieu quang, nhieu tang
hanh tran » hanh trang, thanh tran, hanh tram
hang cong » dang cong, hang nong, bang cong
hoc hieu » hoc thieu, hoc hien, doc hieu
tran van » luan van
van hang » van khang, van hoang, van thang
tuan tap » toan tap, tuyen tap, toan tai
tuan tai » toan tai, quan tai, tan tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu lang - hanh tran van hang cong vuong ((tuan tap) OR (tuan tai))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu lang - hanh tran van hang cong vuong ((tuan tap) OR (tuan tai))".
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - hanh tran van hang cong vuong ((tuan tap) OR (tuan tai))*.