Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
truong cam » truong ca, truong ham, truong lam
truong cao » truong dai
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
khoan cam » khoa cam, khoan va, phan cam
cong ban » cong bang, cong san, cong tan
khan cap » khan ap, than cap, phan cac

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 - manh ((truong cam) or (truong cao)) nhung cong ban ((khan cap) OR (khoan cam))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - manh ((truong cam) OR (truong cao)) nhung cong ban ((khan cap) OR (khoan cam)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - manh ((truong cam) or (truong cao)) nhung cong ban ((khan cap) OR (khoan cam))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - manh ((truong cam) or (truong cao)) nhung cong ban ((khan cap) OR (khoan cam))*.