Perhaps you should try some spelling variations:
va thuat » ky thuat, ki thuat, va thuc
van hanh » van thanh, ban hanh, van anh
hoi cua » hoi chuc
soc van » hoc van, oc van, sac van
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
va cham » va chat, va tham
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang

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