Perhaps you should try some spelling variations:
ly nang » ky nang, ly hang, ly quang
ly vang » ly hang, ly van, ly quang
hieu va » lieu va, hieu qua
hieu ve » hieu van
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
va cua » va chua, via cua, ca cua
sinh » dinh, minh, kinh

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 ((ly nang) OR (ly vang)) xa hoi. ((hieu va) or (hieu ve)) cam xuc va hanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sinh ((ly nang) OR (ly vang)) xa hoi. ((hieu va) OR (hieu ve)) cam xuc va hanh va cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sinh ((ly nang) OR (ly vang)) xa hoi. ((hieu va) or (hieu ve)) cam xuc va hanh va cua tre".
• Adding a wildcard symbol may retrieve word variants: hoc sinh ((ly nang) OR (ly vang)) xa hoi. ((hieu va) or (hieu ve)) cam xuc va hanh va cua tre*.