Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
cac thuong » cac truong, cac chuong, cac tuong
cac phuong » cac truong
hanh dong » anh dong, ha dong
thong den » thong dien, thong dan, tuong den
den tran » den tuan, den thanh, dang tran
tran van » luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (chiet tach)) - hanh dong ((cac thuong) OR (cac phuong)) thong den tran van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chiet tach)) - hanh dong ((cac thuong) OR (cac phuong)) thong den tran van*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (chiet tach)) - hanh dong ((cac thuong) OR (cac phuong)) thong den tran van*".