Perhaps you should try some spelling variations:
tham nuoc » thay nuoc, thoat nuoc, nha nuoc
lang van » dang van, tang van, hoang van
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren
va hanh » van hanh, va thanh, va danh
va tham » van tham, va cham, va thanh
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay
te cac » tu cac, ve cac, te cao

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te cac ky ((lang xa) OR (lang van)) hoi. hieu va tham nuoc va hanh vi ((cua tre) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cac ky ((lang xa) OR (lang van)) hoi. hieu va tham nuoc va hanh vi ((cua tre) or (cuu tre))~".
• Adding a wildcard symbol may retrieve word variants: te cac ky ((lang xa) OR (lang van)) hoi. hieu va tham nuoc va hanh vi ((cua tre) or (cuu tre))*.