Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
ban thanh » ban hanh, ban hang
va triet » va thiet, va trien, ve triet
nuoc ban » nuoc san, quoc ban, buoc ban
thanh vi » hanh vi, thanh va, thanh ve
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
vu khanh » vu thanh, van khanh, duy khanh
hieu ve » hieu va, hieu van
tu sach » thu sach, su sach, te sach
ve cac » va cac, vien cac
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 sach) or (vu khanh)) ky nang x hoi. hieu ve cac nuoc ban thanh vi ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (vu khanh)) ky nang x hoi. hieu ve cac nuoc ban thanh vi ((cua triet) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (vu khanh)) ky nang x hoi. hieu ve cac nuoc ban thanh vi ((cua triet) or (va triet))*.