Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
thanh vi » hanh vi, thanh va, thanh ve
luu truc » luu tru, cau truc, cuu thuc
ky lang » ky nang, ky tang, tay lang
ky dang » ky nang, ky danh
hieu va » lieu va, hieu qua
va cham » va chat, va tham
xuc va » tuc va, luc va, xac va
vi luu » vi lua

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 lang) or (ky dang)) xa hoi. hieu va cham ((xuc va) or (duc va)) thanh vi luu truc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((ky lang) OR (ky dang)) xa hoi. hieu va cham ((xuc va) OR (duc va)) thanh vi luu truc.
• Adding a wildcard symbol may retrieve word variants: toc sach ((ky lang) or (ky dang)) xa hoi. hieu va cham ((xuc va) or (duc va)) thanh vi luu truc*.