Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cua triet » cua viet, su triet, va triet
hieu van » thien van, lieu va, hieu ve
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
cam tu » cam thu, nam tu, dam tu
va cua » va chua, via cua, ca cua

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

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