Perhaps you should try some spelling variations:
luan trong » quan trong, luat trong, luan tuong
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
theo cau » theo chu, theo cap, theo dau
cau sach » cao sach, hau sach, rau sach
cong tap » cuong tap, cong tac, cong tan
doan cau » doan dau, doan cap, doanh chau
toan cau » toan cao, toan tap, toan tai
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: theo cau sach - hanh tang luan trong cong tap ((doan cau) or (((toan cau) OR (toan ban))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo cau sach - hanh tang luan trong cong tap ((doan cau) OR (((toan cau) OR (toan ban)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo cau sach - hanh tang luan trong cong tap ((doan cau) or (((toan cau) OR (toan ban))))".
• Adding a wildcard symbol may retrieve word variants: theo cau sach - hanh tang luan trong cong tap ((doan cau) or (((toan cau) OR (toan ban))))*.