Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cua triet » cua viet, su triet, va triet
chat huu » pham huu
van hanh » van thanh, ban hanh, van anh
cua tre » cua te, cuu tre, dua tren
hanh di » hanh vi, hanh de, hang di
huu van » cuu van, huu han, luu van
tu cach » tu cac
hieu vu » hieu va, hieu ve, hieu su
vu chat » va chat, ve chat, du chat
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (thuoc sach)) ky nang x hoi. hieu vu chat huu van hanh di ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (thuoc sach)) ky nang x hoi. hieu vu chat huu van hanh di ((cua tre) OR (cua triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (thuoc sach)) ky nang x hoi. hieu vu chat huu van hanh di ((cua tre) OR (cua triet))*".