Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
sinh ky » sinh ly, sinh y, kinh ky
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
hieu ve » hieu van
va hanh » van hanh, va danh, ban hanh
cua tre » cua te, cuu tre, cua triet
ca cua » co 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 sinh ky nang xa hoi. ((hieu va) or (hieu ve)) cam xuc ((va hanh) OR (va thanh)) ca cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sinh ky nang xa hoi. ((hieu va) OR (hieu ve)) cam xuc ((va hanh) OR (va thanh)) ca cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sinh ky nang xa hoi. ((hieu va) or (hieu ve)) cam xuc ((va hanh) OR (va thanh)) ca cua tre".
• Adding a wildcard symbol may retrieve word variants: hoc sinh ky nang xa hoi. ((hieu va) or (hieu ve)) cam xuc ((va hanh) OR (va thanh)) ca cua tre*.