Perhaps you should try some spelling variations:
thu san » thuy san, thu ban, phu san
hieu va » lieu va, hieu qua
truc va » thuc va, thuc vat, trung va
cuu tre » cua tre, cau tren, cau treo
hieu ve » hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
san ky » sang ky, van ky, dan ky
tuc va » thuc va, tuc xa, duc va
vi cuu » vi luu, vinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu san ky lang xa hoi. ((hieu ve) or (hieu va)) cam ((tuc va) or (truc va)) hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu san ky lang xa hoi. ((hieu ve) OR (hieu va)) cam ((tuc va) OR (truc va)) hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: thu san ky lang xa hoi. ((hieu ve) or (hieu va)) cam ((tuc va) or (truc va)) hanh vi cuu tre*.