Perhaps you should try some spelling variations:
thuc va » thuc vat, thuc dan, thuc day
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu va » lieu va, hieu qua
dai va » mai va
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
tuc va » truc va, tuc xa, duc va
di va » di vao, doi va, di vat

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: tu sac ky tang xa hoi. hieu va cac ((tuc va) OR (thuc va)) lang ((di va) OR (dai va)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky tang xa hoi. hieu va cac ((tuc va) OR (thuc va)) lang ((di va) or (dai va)) triet~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky tang xa hoi. hieu va cac ((tuc va) OR (thuc va)) lang ((di va) or (dai va)) triet*.