Perhaps you should try some spelling variations:
luong thanh » muong thanh, truong thanh, dong thanh
chieu sach » chinh sach, chieu sang, chieu xanh
luong toan » truong toan, luong tai, luong tin
hanh tang » hanh trang, anh tang, hanh mang
bang cong » dang cong, bang song, hang cong
tang cua » mang cua, hang cua, tang luan
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: theo ((chieu sach) or (chiet tach)) - hanh tang cua bang cong ((luong toan) OR (luong thanh)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chiet tach)) - hanh tang cua bang cong ((luong toan) OR (luong thanh)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (chiet tach)) - hanh tang cua bang cong ((luong toan) OR (luong thanh)) tap".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chiet tach)) - hanh tang cua bang cong ((luong toan) OR (luong thanh)) tap*.