Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thuc day » thuc dan, thuc vat
hanh vai » hanh va, hanh tai, hanh van
thu sach » thuat sach, thuoc sach, thu hoach
thi hanh » thi thanh
tu sach » su sach, te sach, tu cach
hanh xa » hanh va, hanh ma, hanh xu
hieu ve » hieu va, hieu van
ve am » va am

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