Perhaps you should try some spelling variations:
dau tren » dau tien, dat tren, dau tieng
toc sach » hoc sach, doc sach, thuoc sach
cuu tre » cua tre, cau tren, cau treo
dan vat » dang vat, van vat, dan va
nay tuc » nay tu, cay thuc, day thuc
hieu va » lieu va, hieu qua
danh xa » danh ca, dinh xa, canh xa
tuc va » thuc va, truc va, tuc xa
va dan » ca dan, va dao, va dau
2 danh » 1 danh
va nay » va ngay, va cay

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) OR (toc sach)) 2 danh xa hoi. hieu va nay tuc va dan vat ((cuu tre) or (dau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) 2 danh xa hoi. hieu va nay tuc va dan vat ((cuu tre) OR (dau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) 2 danh xa hoi. hieu va nay tuc va dan vat ((cuu tre) or (dau tren))".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) 2 danh xa hoi. hieu va nay tuc va dan vat ((cuu tre) or (dau tren))*.