Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
tu sach » thu sach, su sach, te sach
va hanh » van hanh, va thanh, va danh
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
truc va » thuc va, thuc vat, trung va
cua te » cua tu
ve cam » ve cham, ve cac, va cam
cua su » qua su

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 ty nang xa hoi. hieu ((ve cam) OR (vien cac)) truc va hanh vi ((cua te) OR (cua su))~.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. hieu ((ve cam) or (vien cac)) truc va hanh vi ((cua te) or (cua su))*.