Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
hieu lang » chieu sang, nhieu tang, hieu van
nhung don » nhung van, nhung bo
hang cong » dang cong, hang nong, bang cong
anh dung » anh dong, anh huong, sach dung
dung cua » dung luan, dung cho
tan toan » tan tran, tap toan, van toan
toan ban » van 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) OR (hieu quang)) - anh dung cua ((nhung don) or (hang cong)) tan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu lang) OR (hieu quang)) - anh dung cua ((nhung don) OR (hang cong)) tan toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu lang) OR (hieu quang)) - anh dung cua ((nhung don) or (hang cong)) tan toan ban".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu lang) OR (hieu quang)) - anh dung cua ((nhung don) or (hang cong)) tan toan ban*.