Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
sach ky » sac ky, sach y, sach ty
van cau » van dau, van hau, van chat
cau xuc » cam xuc, cau luc, cau truc
dan dai » dat dai, can dai, dan dat
ma hoi » mai hoi, me hoi, va hoi
xuc va » duc va, tuc va, luc va
va dan » ca dan, va dao, va dau
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 ky nang ((((ma hoi) OR (ma hoa))) or (xa hoi)). hieu van cau xuc va dan dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang ((((ma hoi) OR (ma hoa))) OR (xa hoi)). hieu van cau xuc va dan dai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky nang ((((ma hoi) OR (ma hoa))) or (xa hoi)). hieu van cau xuc va dan dai cua te*".