Perhaps you should try some spelling variations:
dang thai » dang thi, dang hai, dang khai
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cua triet, dua tren
va dang » van dang, va nang, va lang
cuu tre » cau tren, cau treo
hieu ve » hieu va, hieu van
ty sang » ty xang, ty hang, duy sang
ve cho » ve co, ve che, de cho
cho xu » chao xu, choi xu, cho du
xu va » xu van, tu va, su va

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 sach ty sang ((ma hoa) OR (xa hoi)). hieu ve cho xu va dang thai ((cua tre) OR (cuu tre))~.
• Adding a wildcard symbol may retrieve word variants: tu sach ty sang ((ma hoa) or (xa hoi)). hieu ve cho xu va dang thai ((cua tre) or (cuu tre))*.