Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
thanh va » thanh van, hanh va, thanh ha
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu van
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
va cua » va chua, via cua, ca cua
xuc va » duc va, tuc va, luc va
sinh y » sinh ly

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