Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van thanh » ban thanh, van tuan
thi hanh » thi thanh
van hanh » ban hanh, van anh, van ban
sach thi » sach thu, sach tai, sach thieu
hai cua » thai cua, dai cua, hoi cua
tu sach » thu sach, su sach, te sach
hanh xa » hanh va, hanh ma, hanh xu
va am » va lam, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach thi hanh xa hoi. hieu ((ve am) OR (va am)) thuc ((van hanh) or (van thanh)) hai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thi hanh xa hoi. hieu ((ve am) OR (va am)) thuc ((van hanh) OR (van thanh)) hai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thi hanh xa hoi. hieu ((ve am) OR (va am)) thuc ((van hanh) or (van thanh)) hai cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach thi hanh xa hoi. hieu ((ve am) OR (va am)) thuc ((van hanh) or (van thanh)) hai cua triet*.