Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cua triet » cua viet, su triet, va triet
tinh vai » tinh va, tinh hai, tinh bai
hieu van » hieu va, thien van, lieu va
vai cua » dai cua, hai cua, lai cua
va tinh » may tinh
thuy va » thuy van, thuc va, thue va
tu sach » thu sach, su sach, te sach
nang xa » lang xa, nang ma, mang xa
tu ban » thu ban, te ban

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 (tu ban)) ky ((nang xa) or (nang x)) hoi. hieu van thanh thuy va tinh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (tu ban)) ky ((nang xa) OR (nang x)) hoi. hieu van thanh thuy va tinh vai cua triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (tu ban)) ky ((nang xa) or (nang x)) hoi. hieu van thanh thuy va tinh vai cua triet*.