Perhaps you should try some spelling variations:
thien van » thi van
thuc day » thuc dan, thuc vat
tu sach » thu sach, su sach, te sach
cua tre » cua te, cua triet, dua tren
hanh va » hang va, hanh vi
cuu tre » cau tren, cau treo
sach ty » sach y, sach tu, sach thu
van cam » van nam, van lam, van cau
xang xa » lang xa, mang xa, ang xa
xuc va » duc va, tuc va, luc 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 ty xang xa hoi. thien van cam ((xuc va) or (thuc day)) hanh va ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty xang xa hoi. thien van cam ((xuc va) OR (thuc day)) hanh va ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty xang xa hoi. thien van cam ((xuc va) or (thuc day)) hanh va ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: tu sach ty xang xa hoi. thien van cam ((xuc va) or (thuc day)) hanh va ((cua tre) OR (cuu tre))*.