Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
cang thang » cong thanh, dang thanh
tieu sach » chieu sach, dien sach, te sach
hang hang » nang hang, hung thang, lang thang
ca nhung » cua nhung, cam nhung, va nhung
cong tan » cong tac, cong san, cong thanh
tran cau » tran chau, toan cau, ran cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sach - ((hang hang) or (cang thang)) ca nhung cong tan tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - ((hang hang) OR (cang thang)) ca nhung cong tan tran cau.
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - ((hang hang) or (cang thang)) ca nhung cong tan tran cau*.