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

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