Perhaps you should try some spelling variations:
hoc sac » hoc sach, hoc cac, hoc mac
va danh » va dinh, va dan, dia danh
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
via cua » gia cua, gian cua, giau cua
hieu ve » hieu van
va hanh » van hanh, va thanh, ban hanh
sac ky » cac ky, sai ky
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sac ky nang xa hoi. ((hieu va) or (hieu ve)) cam xuc ((va danh) or (va hanh)) via cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sac ky nang xa hoi. ((hieu va) OR (hieu ve)) cam xuc ((va danh) OR (va hanh)) via cua te.
• Adding a wildcard symbol may retrieve word variants: hoc sac ky nang xa hoi. ((hieu va) or (hieu ve)) cam xuc ((va danh) or (va hanh)) via cua te*.