Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
cham duc » pham duc, cham soc, pham duy
tu sach » thu sach, su sach, te sach
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
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y nang xa hoi. hieu van cham duc va hanh ((di cua) or (hoi cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu van cham duc va hanh ((di cua) OR (hoi cua)) triet.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu van cham duc va hanh ((di cua) or (hoi cua)) triet*.