Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
nang xa » nang x, lang xa, nang ma
qua cac » cua cac
cac tuc » cac toc, cac tu, cac tac
va danh » va dinh, va dan, va hanh
danh di » danh du, xanh di, danh dien
cua tre » cua triet, dua tren, cua thep
cuu tre » cau tren, cau treo
y nang » ky nang, ly nang, v nang
tuc va » thuc va, truc va, tuc xa
cua te » cua tu

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 y nang xa hoi. hieu qua cac tuc va danh di ((((cua tre) OR (cua te))) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y nang xa hoi. hieu qua cac tuc va danh di ((((cua tre) OR (cua te))) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y nang xa hoi. hieu qua cac tuc va danh di ((((cua tre) OR (cua te))) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: toc sach y nang xa hoi. hieu qua cac tuc va danh di ((((cua tre) OR (cua te))) or (cuu tre))*.