Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
cua tre » cua te, cuu tre, cua triet
hanh di » hanh vi, hanh de, danh di
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu va » lieu va, hieu qua
hang di » hang doi, hang vi, hang dien
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky tang xa hoi. ((hieu van) OR (hieu va)) cam xuc va ((hanh di) or (hang di)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky tang xa hoi. ((hieu van) OR (hieu va)) cam xuc va ((hanh di) OR (hang di)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky tang xa hoi. ((hieu van) OR (hieu va)) cam xuc va ((hanh di) or (hang di)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu san ky tang xa hoi. ((hieu van) OR (hieu va)) cam xuc va ((hanh di) or (hang di)) cua tre*.