Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac
cham tuc » nham thuc, pham thuc, tham thuc
hoc anh » hoc nganh, hoc nhanh, ngoc anh
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cham » va chat, va tham
xa hanh » xa thanh, xa khanh, va hanh
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) or (hoc anh)) ky nang xa hoi. hieu va cham tuc xa hanh ((vi cua) OR (di cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (hoc anh)) ky nang xa hoi. hieu va cham tuc xa hanh ((vi cua) OR (di cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) or (hoc anh)) ky nang xa hoi. hieu va cham tuc xa hanh ((vi cua) OR (di cua)) triet".
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) or (hoc anh)) ky nang xa hoi. hieu va cham tuc xa hanh ((vi cua) OR (di cua)) triet*.