Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
hanh mang » nhanh mang, hanh trang, nhanh lang
bang cong » dang cong, bang song, hang cong
ho chieu » theo chieu, hoc thieu, mot chieu
cong san » cong tac
mang va » mang vua, hang va, bang va
va bang » va nang, va lang, va ban
than ma » than man, khan ma, nhan ma
than va » thanh va, nhan va, toan va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) OR (doi chieu)) sach - hanh mang va bang cong san ((than ma) or (than va))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) sach - hanh mang va bang cong san ((than ma) OR (than va)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (doi chieu)) sach - hanh mang va bang cong san ((than ma) or (than va))".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (doi chieu)) sach - hanh mang va bang cong san ((than ma) or (than va))*.