Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
doi cua » dai cua, hoi cua, dong cua
va danh » va dinh, va dan, va hanh
cam duc » cam xuc, cao duc, pham duc
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
di cua » dai cua, de cua, do cua

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ty nang xa hoi. hieu ve cam duc va danh ((di cua) OR (doi cua)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ty nang xa hoi. hieu ve cam duc va danh ((di cua) or (doi cua)) triet~".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) ty nang xa hoi. hieu ve cam duc va danh ((di cua) or (doi cua)) triet*.