Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hanh trang » thanh trung, canh tranh, hanh trinh
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
trang va » tran van, hang va
cong san » cong tac
toan ban » van 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 va nhung cong san ((toan ban) or (((toan cao) OR (toan tap))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh trang va nhung cong san ((toan ban) OR (((toan cao) OR (toan tap)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - hanh trang va nhung cong san ((toan ban) or (((toan cao) OR (toan tap))))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh trang va nhung cong san ((toan ban) or (((toan cao) OR (toan tap))))*.