Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
banh trang » hanh trang, ban trang, banh rang
hoc thieu » toc thieu, hoc hien
trang va » tran van, hang va
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
va hang » van hang, 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 - banh trang va hang ((cong dan) OR (cong tan)) phan tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - banh trang va hang ((cong dan) OR (cong tan)) phan tu".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - banh trang va hang ((cong dan) OR (cong tan)) phan tu*.