Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
nang xa » nang x, lang xa, nang ma
cao duc » dao duc, giao duc, tao duoc
cao suc » cao su
va danh » va dinh, va dan, va hanh
y nang » ky nang, ly nang, v nang
di cua » dai cua, doi cua, de cua
te cua » tue cua, le cua, de cua

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 ((cao duc) or (cao suc)) va danh ((di cua) or (te cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y nang xa hoi. hieu qua ((cao duc) OR (cao suc)) va danh ((di cua) OR (te cua)) tre.
• Adding a wildcard symbol may retrieve word variants: toc sach y nang xa hoi. hieu qua ((cao duc) or (cao suc)) va danh ((di cua) or (te cua)) tre*.