Perhaps you should try some spelling variations:
chiet tach » chieu sach
thanh tung » thanh cong
hieu lang » chieu sang, hieu quang, nhieu tang
bang cong » dang cong, bang song, hang cong
manh toan » thanh toan, tinh toan
tung cua » trung cua, tuong cua, dung cua
cua bang » chua bang, cua ban, cua dang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chiet tach) or (hieu lang)) - thanh tung cua bang cong ((manh toan) OR (anh tuan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chiet tach) OR (hieu lang)) - thanh tung cua bang cong ((manh toan) OR (anh tuan)) tap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chiet tach) or (hieu lang)) - thanh tung cua bang cong ((manh toan) OR (anh tuan)) tap*".