Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
thanh tung » thanh cong
manh tuong » manh tung, manh cuong, minh tuong
hoc thieu » toc thieu, hoc hien
dang cong » dung cong
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan cau » phan cau, can cau, chinh cau
va dang » van dang, va nang, va lang

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