Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
dinh lam » dinh van, tinh lao
danh lai » danh sai, gianh lai, hanh lam
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu va » lieu va, hieu qua
cam luc » cam xuc, cau luc
va cam » va cham, va cac, va cao
luc va » duc va, tuc va, loc va
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: ((te sach) or (toc sach)) ky tang xa hoi. hieu va cam luc va ((danh lai) OR (dinh lam)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ky tang xa hoi. hieu va cam luc va ((danh lai) OR (dinh lam)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (toc sach)) ky tang xa hoi. hieu va cam luc va ((danh lai) OR (dinh lam)) cua te".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) ky tang xa hoi. hieu va cam luc va ((danh lai) OR (dinh lam)) cua te*.