Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
van hanh » van thanh, ban hanh, van anh
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
duc van » duc va, duc tan, duc manh
cua cay » cua cac
ve cao » va cao, ve bao, ve co
ve cac » va cac, vien cac
vi cua » vai cua, di 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: hoc sach ty nang xa hoi. hieu ((ve cao) OR (ve cac)) duc van hanh vi cua cay~.
• Adding a wildcard symbol may retrieve word variants: hoc sach ty nang xa hoi. hieu ((ve cao) or (ve cac)) duc van hanh vi cua cay*.