Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
tong cong » trong cong, cong cong, dung cong
tran gian » tran giang, tran gia, trang giai
ho chieu » theo chieu, hoc thieu, doi chieu
tung vap » tung va, trung van, tuong vao
vap tong » va tong, cap tong, gap trong

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 - thanh tung vap tong cong ((tran gian) or (dan gian)) cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh tung vap tong cong ((tran gian) OR (dan gian)) cap.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh tung vap tong cong ((tran gian) or (dan gian)) cap*.