Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
cham tuc » nham thuc, pham thuc, tham thuc
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va danh » va dinh, va dan, va hanh
danh tu » anh tu, doanh thu
cua tre » cua te, cuu tre, cua triet
thi va » thi van, phi va, thi vu
thi ha » thi hai, thi hanh
tuc va » thuc va, truc va, tuc xa
tu cua » hu cua, vu 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 ky nang xa hoi. ((thi va) OR (thi ha)) cham tuc va danh tu cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky nang xa hoi. ((thi va) OR (thi ha)) cham tuc va danh tu cua tre".
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang xa hoi. ((thi va) OR (thi ha)) cham tuc va danh tu cua tre*.