Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
danh di » danh du, xanh di, danh dien
hanh de » hanh ve, hanh kem
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
x hoi » xa hoi, o hoi, x ho
va am » va lam, va cam
thuc » thu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ty nang x hoi. lieu va am thuc vat ((danh di) or (hanh de)) ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty nang x hoi. lieu va am thuc vat ((danh di) OR (hanh de)) ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty nang x hoi. lieu va am thuc vat ((danh di) or (hanh de)) ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: toc sach ty nang x hoi. lieu va am thuc vat ((danh di) or (hanh de)) ((cua tre) OR (cuu tre))*.