Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
vien cac » vien bach, vien dai, vien da
van hanh » van thanh, ban hanh, van anh
cua viet » ca viet, hoa viet, cua vat
ve cham » va cham, ve chat, vu cham
sach ky » sac ky, sach y, sach ty
xuc van » duc van, luc van, xuc ban
nang xa » nang x, lang xa, nang ma
vi cua » vai cua, di cua
ve cac » va cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ky nang xa hoi. hieu ((ve cham) or (((ve cac) OR (vien cac)))) xuc van hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ky nang xa hoi. hieu ((ve cham) OR (((ve cac) OR (vien cac)))) xuc van hanh vi cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ky nang xa hoi. hieu ((ve cham) or (((ve cac) OR (vien cac)))) xuc van hanh vi cua viet".
• Adding a wildcard symbol may retrieve word variants: hoc sach ky nang xa hoi. hieu ((ve cham) or (((ve cac) OR (vien cac)))) xuc van hanh vi cua viet*.