Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
vu sach » vu bach, vu khach
su sach » so sach
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu le » hieu ve, hieu he, hieu ly
ma thuc » mau thuc, va thuc, ma thu
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
danh di » danh du, xanh di, danh dien
di cua » dai cua, doi cua, de cua
le ma » le mau, le mai, le va

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) or (su sach)) ty nang xa hoi. hieu le ma thuc va danh di cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (su sach)) ty nang xa hoi. hieu le ma thuc va danh di cua viet.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (su sach)) ty nang xa hoi. hieu le ma thuc va danh di cua viet*.