Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
vang cua » mang cua, hang cua, tang cua
va thanh » gia thanh, ban thanh, va tinh
van cua » ban cua, dan cua, nan cua
nam duc » nam duoc, pham duc, nam thuc
tu sach » thu sach, su sach, te sach
ty hang » ly hang, ty xang, thi hang
ty nang » ky nang, ty xang, ly nang
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 hang)) x hoi. hieu van nam duc va thanh ((van cua) or (vang cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ty hang)) x hoi. hieu van nam duc va thanh ((van cua) OR (vang cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) OR (ty hang)) x hoi. hieu van nam duc va thanh ((van cua) or (vang cua)) te".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) OR (ty hang)) x hoi. hieu van nam duc va thanh ((van cua) or (vang cua)) te*.