Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
so sach » so sanh, bo sach, co 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
va danh » va dinh, va dan, va hanh
danh di » danh du, xanh di, danh dien
vu sach » vu bach, vu khach
ma thu » va thu
thu va » thuc va, thue va, tu va
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) OR (so sach)))) ty nang xa hoi. hieu le ma thu va danh di cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (((su sach) OR (so sach)))) ty nang xa hoi. hieu le ma thu va danh di cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (((su sach) OR (so sach)))) ty nang xa hoi. hieu le ma thu va danh di cua viet".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (((su sach) OR (so sach)))) ty nang xa hoi. hieu le ma thu va danh di cua viet*.