Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hoc thieu » toc thieu, hoc hien
trung dap » trung cap, trung dam, trung lap
trung dai » truong dai, truong dao, trung tam
ung cong » dung cong, luong cong, duong cong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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 ((trung dap) OR (trung dai)) ung cong dan than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - thanh ((trung dap) OR (trung dai)) ung cong dan than cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - thanh ((trung dap) OR (trung dai)) ung cong dan than cau*.