Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hanh cat » hanh cac, hanh luat, nhanh cay
van hanh » van thanh, ban hanh, van anh
loc van » luoc van, hoc van, lo van
su sach » so sach, vu sach
ty nang » ky nang, ty hang, ly nang
ve cham » va cham, ve chat, vu cham
ma hoi » mai hoi, xa hoi, ma hoa
va cam » va cham, va cac, va cao
cat va » chat va, cat van, dat va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((ty nang) OR (ty xang)) ma hoi. hieu ((ve cham) or (va cam)) loc van hanh cat va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty nang) OR (ty xang)) ma hoi. hieu ((ve cham) OR (va cam)) loc van hanh cat va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty nang) OR (ty xang)) ma hoi. hieu ((ve cham) or (va cam)) loc van hanh cat va triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty nang) OR (ty xang)) ma hoi. hieu ((ve cham) or (va cam)) loc van hanh cat va triet*.