Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
toc sach » hoc sach, doc sach, thuoc sach
nam truc » nam truoc, nam thuc, nam trung
hanh tai » thanh tai, hang tai, han tai
van hanh » van thanh, ban hanh, van anh
hieu van » hieu va, thien van, lieu va
tai cua » thai cua, tai cuc, tri cua
nam tuc » nam thuc, nam tu, nam thuoc
nang xa » nang x, lang xa, nang ma
cua te » cua tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (nuoc sach)) ky nang xa hoi. hieu van ((nam tuc) OR (nam truc)) van hanh tai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (nuoc sach)) ky nang xa hoi. hieu van ((nam tuc) OR (nam truc)) van hanh tai cua te~".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (nuoc sach)) ky nang xa hoi. hieu van ((nam tuc) OR (nam truc)) van hanh tai cua te*.