Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
va tham » van tham, va thanh, va thuat
doi cua » hoi cua, dong cua
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
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 tham)) soc van hanh ((dai cua) or (doi 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 tham)) soc van hanh ((dai cua) OR (doi cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang xa hoi. hieu ((va cham) OR (va tham)) soc van hanh ((dai cua) or (doi cua)) triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. hieu ((va cham) OR (va tham)) soc van hanh ((dai cua) or (doi cua)) triet*.