Perhaps you should try some spelling variations:
hoc chieu » ho chieu, hoc dieu, hoc thiet
hoc thieu » toc thieu
hanh tang » hanh trang, anh tang, hanh mang
tong cong » trong cong, cong cong, dung cong
tang cua » mang cua, hang cua, tang luan
cua tong » cua cong, cua dong, cua nong
cong tan » cong tac, cong san, cong thanh
tan van » tran van, tang van, luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((hoc chieu) OR (hoc thieu))) or (hoc hien)) sach - hanh tang cua tong cong tan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((hoc chieu) OR (hoc thieu))) OR (hoc hien)) sach - hanh tang cua tong cong tan van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((hoc chieu) OR (hoc thieu))) or (hoc hien)) sach - hanh tang cua tong cong tan van ban".
• Adding a wildcard symbol may retrieve word variants: ((((hoc chieu) OR (hoc thieu))) or (hoc hien)) sach - hanh tang cua tong cong tan van ban*.