Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhiet nang » nhiet dong, viet nang, nhieu tang
hanh trung » thanh trung, hanh trang, manh trung
nhung cong » dung cong, thong cong, hang cong
trung nam » trung tam, trong nam, trung cap
nam nhung » cam nhung, tham nhung, va nhung
van toan » van tan, van thanh, manh toan
van tuan » van quan, van ban, anh tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sach) or (nhiet nang)) - hanh trung nam nhung cong ((van toan) OR (van tuan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (nhiet nang)) - hanh trung nam nhung cong ((van toan) OR (van tuan)) cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sach) or (nhiet nang)) - hanh trung nam nhung cong ((van toan) OR (van tuan)) cau*".