Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cua triet, dua tren
dan vat » dang vat, van vat, dan dat
cuu tre » cau tren, cau treo
cac tuc » cac toc, cac tu, cac tac
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
tuc va » thuc va, truc va, tuc xa
dan va » doan va, dan ca, ban va

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

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