Perhaps you should try some spelling variations:
toc sach » doc sach, thuoc sach, nuoc sach
hoc sach » hoc sinh, hoc cac, hoc anh
tai cua » thai cua, tai cuc, tri cua
nang ma » tang ma, sang ma, nang cao
han tai » hang tai, nhan tai, van tai
va han » va phan, van han, va hanh
xuc va » duc va, tuc va, luc va
cua te » cua tu
va cao » va cac, va co, va dao
va cam » va cham, va cac, va cai
ma hoi » mai hoi, xa hoi, ma hoa

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 sach)) ky nang ma hoi. lieu ((va cam) OR (va cao)) xuc va han tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) ky nang ma hoi. lieu ((va cam) OR (va cao)) xuc va han tai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (hoc sach)) ky nang ma hoi. lieu ((va cam) OR (va cao)) xuc va han tai cua te*".