Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
cham luc » cham soc, nhan luc, cham cuu
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
hoi cua » hoi chuc
y nang » ky nang, ly nang, v nang
luc va » duc va, tuc va, loc va
di cua » dai cua, doi cua, do cua
de cua » le cua, te cua, dieu cua

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 y nang xa hoi. hieu van cham luc va hanh ((((di cua) or (de cua))) or (hoi cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y nang xa hoi. hieu van cham luc va hanh ((((di cua) OR (de cua))) OR (hoi cua)) triet.
• Adding a wildcard symbol may retrieve word variants: toc sach y nang xa hoi. hieu van cham luc va hanh ((((di cua) or (de cua))) or (hoi cua)) triet*.