Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
nhung cong » dung cong, thong cong, hang cong
dieu sach » dien sach, chieu sach, dieu hanh
thanh bai » thanh hai, thanh tai, thanh oai
thanh van » thanh san, thanh toan, thanh phan
hoc dieu » hoc thieu, hoc hien
trang va » tran van, hang va
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 sach - hanh trang va nhung cong tan ((thanh bai) or (thanh van))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc dieu sach - hanh trang va nhung cong tan ((thanh bai) OR (thanh van)).
• Adding a wildcard symbol may retrieve word variants: hoc dieu sach - hanh trang va nhung cong tan ((thanh bai) or (thanh van))*.