Perhaps you should try some spelling variations:
thien van » thi van
thanh va » thanh van, hanh va, thanh ha
sach doi » sach hoi, sach moi, sach dao
cau tren » cu tren, dau tren, ca tren
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
van hac » van hoc, van ha, van hai
hac tuc » thac toc, thai tuc
tuc gia » tac gia, duc gia, toc gia
cua tre » cua te, cuu tre, cua triet
bo sach » co sach, hoc sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: bo sach doi ((nang xa) OR (nang ma)) hoi. thien van hac tuc gia thanh va ((cua tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach doi ((nang xa) OR (nang ma)) hoi. thien van hac tuc gia thanh va ((cua tre) OR (cau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "bo sach doi ((nang xa) OR (nang ma)) hoi. thien van hac tuc gia thanh va ((cua tre) or (cau tren))".
• Adding a wildcard symbol may retrieve word variants: bo sach doi ((nang xa) OR (nang ma)) hoi. thien van hac tuc gia thanh va ((cua tre) or (cau tren))*.