Perhaps you should try some spelling variations:
cua triet » su triet, va triet
nuoc ban » nuoc san, quoc ban, buoc ban
ban hanh » ban hang
hanh vai » hanh vi, hanh va, hanh tai
cua viet » ca viet, hoa viet, cua vat
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve hoc » te hoc, va hoc, vi hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (vu bach)) ky nang xa hoi. hieu ve hoc nuoc ban hanh vai ((cua triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (vu bach)) ky nang xa hoi. hieu ve hoc nuoc ban hanh vai ((cua triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (vu bach)) ky nang xa hoi. hieu ve hoc nuoc ban hanh vai ((cua triet) or (cua viet))*.