Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hanh tang » hanh trang, anh tang, hanh mang
cua thong » cua thuong, cua khong, cua tong
hoc dieu » hoc thieu, hoc hien
ho chieu » theo chieu, hoc thieu, doi chieu
tang cua » mang cua, hang cua, tang luan
cong tan » cong tac, cong san, cong thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc dieu) or (ho chieu)) sach - hanh tang cua thong cong tan ((toan ban) or (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc dieu) OR (ho chieu)) sach - hanh tang cua thong cong tan ((toan ban) OR (van ban)).
• Adding a wildcard symbol may retrieve word variants: ((hoc dieu) or (ho chieu)) sach - hanh tang cua thong cong tan ((toan ban) or (van ban))*.