Perhaps you should try some spelling variations:
cac thuc » cach thuc, cac thu, can thuc
vat hanh » vat thanh, van hanh, va hanh
ve triet » va trien, su triet
bo sach » co sach, hoc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hanh va » hang va, hanh vi
su viet » so viet

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

• Performing a fuzzy search may retrieve terms with similar spellings: bo sach ky nang xa hoi. lieu va cac thuc vat hanh va ((su viet) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach ky nang xa hoi. lieu va cac thuc vat hanh va ((su viet) OR (ve triet)).
• Adding a wildcard symbol may retrieve word variants: bo sach ky nang xa hoi. lieu va cac thuc vat hanh va ((su viet) or (ve triet))*.