Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
nhung cong » dung cong, thong cong, nhung don
tieu sach » dien sach, te sach, viet sach
hang cong » dang cong, hang nong, bang cong
manh toan » thanh toan, anh tuan, tinh toan
tung cua » trung cua, tuong cua, dung cua
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((tieu sach) or (chieu sach)) - thanh tung cua ((nhung cong) OR (hang cong)) manh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((tieu sach) OR (chieu sach)) - thanh tung cua ((nhung cong) OR (hang cong)) manh toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((tieu sach) or (chieu sach)) - thanh tung cua ((nhung cong) OR (hang cong)) manh toan cao".
• Adding a wildcard symbol may retrieve word variants: theo ((tieu sach) or (chieu sach)) - thanh tung cua ((nhung cong) OR (hang cong)) manh toan cao*.