Perhaps you should try some spelling variations:
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, nam duoc
va danh » va dinh, va dan, va hanh
doi cua » dai cua, hoi cua, dong cua
do cua » co cua, de cua, dong 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 ty nang xa hoi. hieu ve ((cam duc) OR (pham duc)) va danh ((do cua) OR (doi cua)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang xa hoi. hieu ve ((cam duc) OR (pham duc)) va danh ((do cua) or (doi cua)) triet~".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang xa hoi. hieu ve ((cam duc) OR (pham duc)) va danh ((do cua) or (doi cua)) triet*.