Perhaps you should try some spelling variations:
cau thuc » cau truc, cuu thuc, can thuc
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
va cau » van cau, va cac, va dau
vi cua » vai cua
di cua » dai cua, doi cua, de cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. lieu va cau thuc va hanh ((vi cua) OR (di cua)) tre~.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. lieu va cau thuc va hanh ((vi cua) or (di cua)) tre*.