Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hanh tranh » canh tranh, hanh trinh, hanh trang
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
tranh va » tranh van, trang va, trinh va
dan than » ban than, dan toan, dang thanh
dan chan » dan gian, dan ca, van chat
van than » van thanh, van thang, van tuan

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 - hanh tranh va nhung cong ((((dan than) or (dan chan))) or (van than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh tranh va nhung cong ((((dan than) OR (dan chan))) OR (van than)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh tranh va nhung cong ((((dan than) or (dan chan))) or (van than)) cau*.