Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
so sach » so sanh, bo sach, co sach
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach y, sach ty
xuc va » duc va, tuc va, luc va
vi hoa » voi hoa, vi hoc, va hoa
ve cau » ke cau, va cau, ve cac
ve cai » va cai, ve cac, ve tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky dang xa hoi. hieu ((((ve cai) or (ve cau))) or (vien cac)) xuc va hanh vi hoa viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky dang xa hoi. hieu ((((ve cai) OR (ve cau))) OR (vien cac)) xuc va hanh vi hoa viet.
• Adding a wildcard symbol may retrieve word variants: so sach ky dang xa hoi. hieu ((((ve cai) or (ve cau))) or (vien cac)) xuc va hanh vi hoa viet*.