Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trinh quan » tinh quang, trinh luat, trinh han
thu phuong » thi phuong, thu huong, theo phuong
nhung cong » dung cong, thong cong, hang cong
hoc chieu » hoc thieu, ho chieu, hoc hien
trinh cua » tinh cua, trinh luat, trinh luan
dan toan » van toan, dan than, manh toan
toan ban » van ban

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 - hanh ((trinh cua) OR (trinh quan)) ((thu phuong) or (nhung cong)) dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - hanh ((trinh cua) OR (trinh quan)) ((thu phuong) OR (nhung cong)) dan toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - hanh ((trinh cua) OR (trinh quan)) ((thu phuong) or (nhung cong)) dan toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh ((trinh cua) OR (trinh quan)) ((thu phuong) or (nhung cong)) dan toan ban*.