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

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)) xuc van hanh ((vi cua) OR (di 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)) xuc van hanh ((vi cua) OR (di 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)) xuc van hanh ((vi cua) OR (di cua)) viet".
• Adding a wildcard symbol may retrieve word variants: hoc sach ky nang xa hoi. hieu ((ve cham) or (ve cac)) xuc van hanh ((vi cua) OR (di cua)) viet*.