Perhaps you should try some spelling variations:
van nang » van quang, van ban, van dong
kham duc » pham duc, kham cuoc, pham duy
hang cua » mang cua, hang ca, huong cua
va triet » va thiet, va trien, ve triet
vu sach » vu bach, su sach, vu khach
hieu vu » hieu va, hieu ve, hieu su
vu kham » vu khanh
va hang » van hang, va nang, va lang
cua va » cua vat, chua va, cua van

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ((ky nang) or (van nang)) xa hoi. hieu vu kham duc va hang cua va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((ky nang) OR (van nang)) xa hoi. hieu vu kham duc va hang cua va triet.
• Adding a wildcard symbol may retrieve word variants: vu sach ((ky nang) or (van nang)) xa hoi. hieu vu kham duc va hang cua va triet*.