Perhaps you should try some spelling variations:
thieu sach » thien hach, hieu cach, theo sach
chieu sach » chinh sach, chiet tach, chieu sang
hanh trang » thanh trung, canh tranh, hanh trinh
nhung cong » dung cong, thong cong, hang cong
trang cua » tranh cua, tang cua, trung cua
cua nhung » va nhung
tran chau » tranh chap, tran huu
cong tan » cong tac, cong san, cong thanh
tran cau » toan cau, ran cau, tra cau

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

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