Perhaps you should try some spelling variations:
kho tang » cao tang
sac kho » suc khoe, cac khoi, dac khoa
tang xa » trang xa, tang ma, lang xa
hieu va » lieu va, hieu qua
va cham » va chat, va tham
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
tu sac » tu sach, tu cac, tu san
tuc va » truc va, tuc xa, duc va
dan va » doan va, dan ca, ban va
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac kho tang xa hoi. hieu va cham ((tuc va) or (thuc va)) dan va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac kho tang xa hoi. hieu va cham ((tuc va) OR (thuc va)) dan va cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sac kho tang xa hoi. hieu va cham ((tuc va) or (thuc va)) dan va cua tre*.