Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hanh trang » thanh trung, canh tranh, hanh trinh
hoc thieu » toc thieu, hoc hien
van nang » van quang, van dong, van dung
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan tap » toan ban

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 trang ((van nang) or (van ban)) cong san toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh trang ((van nang) OR (van ban)) cong san toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh trang ((van nang) or (van ban)) cong san toan tap*.