Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
cua triet » cua viet, su triet, va triet
vu khanh » vu thanh, van khanh, duy khanh
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
vai cua » dai cua, hai cua, lai cua
ve hoc » te hoc, va hoc, vi hoc
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 hoc (nuoc or duoc) va thanh vai cua 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 hoc (nuoc OR duoc) va thanh vai cua triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (vu khanh)) ky nang x hoi. hieu ve hoc (nuoc or duoc) va thanh vai cua triet*.