Perhaps you should try some spelling variations:
chieu lang » chieu sang, chi lang, chieu xanh
hieu lang » chieu sang, hieu quang, nhieu tang
luan bang » luan nang, luan ban, luan tang
bang cong » dang cong, bang song, hang cong
anh dung » anh dong, sach dung, ung dung
cong tac » cong ty
tac toan » tap toan, tam toan, hach 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: doc ((hieu lang) or (chieu lang)) - ((anh dung) OR (anh huong)) luan bang cong tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu lang) OR (chieu lang)) - ((anh dung) OR (anh huong)) luan bang cong tac toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu lang) or (chieu lang)) - ((anh dung) OR (anh huong)) luan bang cong tac toan tap".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu lang) or (chieu lang)) - ((anh dung) OR (anh huong)) luan bang cong tac toan tap*.