Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
kho tang » cao tang
tinh van » trinh van, dinh van, tich van
tinh va » tich va, trinh van, trinh vat
qua cac » cua cac
san kho » san khoa, san cho, lan kho
qua cam » qua cham, qua ca, qua cai
tang xa » trang xa, tang ma, lang xa
te san » te ban, ke san, tu san

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 san kho tang xa hoi. hieu ((qua cam) OR (qua cac)) duc va ((tinh va) OR (tinh van)) cau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te san kho tang xa hoi. hieu ((qua cam) OR (qua cac)) duc va ((tinh va) or (tinh van)) cau tren~".
• Adding a wildcard symbol may retrieve word variants: te san kho tang xa hoi. hieu ((qua cam) OR (qua cac)) duc va ((tinh va) or (tinh van)) cau tren*.