Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trinh chat » tinh chat, trinh luat, trinh han
thuc nhung » phuc nhung, thu nhung, thuc chung
hoc chieu » hoc thieu, ho chieu, hoc hien
thuc hung » thuc chung, thuc dung, thuc cung
cong tang » cong thang, cong lang, cong vang
cong tan » cong tac, cong san, cong thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sach - trinh chat ((thuc hung) OR (thuc nhung)) ((cong tan) or (cong tang)) phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - trinh chat ((thuc hung) OR (thuc nhung)) ((cong tan) OR (cong tang)) phan tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - trinh chat ((thuc hung) OR (thuc nhung)) ((cong tan) or (cong tang)) phan tu".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - trinh chat ((thuc hung) OR (thuc nhung)) ((cong tan) or (cong tang)) phan tu*.