Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
hanh hang » thanh hang, hang hang, hanh han
hoc thong » hoc thuong, hoc trong, hoc hong
cuong tap » luong tap, cong tac, luong tai
hang hoc » hang hoa, nang hoc, bang hoc
cong tap » cong tac, cong tan, tong tap
danh bat » doanh bat, anh bai, dinh ba

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 (chieu sang)) - hanh hang hoc thong ((cong tap) OR (cuong tap)) danh bat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chieu sang)) - hanh hang hoc thong ((cong tap) OR (cuong tap)) danh bat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (chieu sang)) - hanh hang hoc thong ((cong tap) OR (cuong tap)) danh bat".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chieu sang)) - hanh hang hoc thong ((cong tap) OR (cuong tap)) danh bat*.