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
tran manh » tran minh, tran thanh, tran van
trang va » tran van, hang va
va trong » va truong, va thong, va tuong
cong san » cong tac
than ban » thanh ban, toan ban, nhuan ban
than man » than ma, thanh san, than phan

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 va trong cong san ((than ban) or (((than man) OR (tran manh))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh trang va trong cong san ((than ban) OR (((than man) OR (tran manh)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - hanh trang va trong cong san ((than ban) or (((than man) OR (tran manh))))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh trang va trong cong san ((than ban) or (((than man) OR (tran manh))))*.