Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
truong cam » truong cao, truong ham, truong lam
nhung cong » dung cong, thong cong, hang cong
truong ca » truong cao, truong va, trong ca
ban khoan » toan khoan, san khoa, ban than
ho chieu » theo chieu, hoc thieu, doi chieu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - manh ((truong cam) OR (truong ca)) nhung cong ((ban khoan) or (cac khoan)) cam~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - manh ((truong cam) OR (truong ca)) nhung cong ((ban khoan) OR (cac khoan)) cam.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - manh ((truong cam) OR (truong ca)) nhung cong ((ban khoan) or (cac khoan)) cam".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - manh ((truong cam) OR (truong ca)) nhung cong ((ban khoan) or (cac khoan)) cam*.