Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
va hang » van hang, va nang, va hanh
tai cua » thai cua, tai cuc, tri cua
hoc anh » hoc nganh, hoc nhanh, ngoc anh
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu va » lieu va, hieu qua
va lang » va nang, hoa lang
nam tuc » nam thuc, nam truc, nam tu
va nam » van nam, ha nam, va nay
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) or (hoc anh)) ky dang xa hoi. hieu va nam tuc ((va hang) or (va lang)) tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc anh)) ky dang xa hoi. hieu va nam tuc ((va hang) OR (va lang)) tai cua te.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (hoc anh)) ky dang xa hoi. hieu va nam tuc ((va hang) or (va lang)) tai cua te*.