Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hanh lam » thanh lap, hanh kem, hanh va
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
cua tre » cuu tre, cua triet, dua tren
sach ky » sac ky, sach y, sach ty
luu van » cuu van, luan van, luu hanh
ve cac » va cac, vien cac
ve cam » ve cham, va cam, ve cai
cua te » cua tu

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 ky nang xa hoi. hieu ((ve cam) OR (ve cac)) luu van hanh lam ((cua tre) OR (cua te))~.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu ((ve cam) or (ve cac)) luu van hanh lam ((cua tre) or (cua te))*.