Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
lam chat » luan chat, cao chat, ly chat
van hanh » van thanh, ban hanh, van anh
cham duc » pham duc, cham soc, pham duy
van cham » van chat, van tham, va cham
duc van » duc va, duc tan, duc manh
lam cua » nam cua
ty nang » ky nang, ty hang, ly nang
tu sach » thu sach, su sach, te sach
x hoi » xa hoi, o hoi, x ho

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) OR (ty xang)) x hoi. hieu van cham duc van hanh ((lam cua) or (lam chat)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ty xang)) x hoi. hieu van cham duc van hanh ((lam cua) OR (lam chat)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) OR (ty xang)) x hoi. hieu van cham duc van hanh ((lam cua) or (lam chat)) viet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) OR (ty xang)) x hoi. hieu van cham duc van hanh ((lam cua) or (lam chat)) viet*.