Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh dai » hanh tai, hanh dao, vanh dai
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
va cham » va chat, va tham
tu sac » tu cac, tu san, tu bac
soc va » hoc va, loc va, goc va
doc va » duoc va, hoc va, duc va
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 sac) or (tu sach)) ky nang x hoi. hieu va cham ((soc va) OR (doc va)) hanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu sach)) ky nang x hoi. hieu va cham ((soc va) OR (doc va)) hanh dai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) or (tu sach)) ky nang x hoi. hieu va cham ((soc va) OR (doc va)) hanh dai cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (tu sach)) ky nang x hoi. hieu va cham ((soc va) OR (doc va)) hanh dai cua triet*.