Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
chat tuc » chat xuc, luat tuc, chat huu
so sach » so sanh, bo sach, co sach
san cuu » san cua, san huu, song cuu
ve chat » va chat, van chat
hieu ve » hieu va, hieu van
cuu tre » cua tre, cau tren, cau treo
ty nang » ky nang, ty hang, ly nang
co hoi » co hoc
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ((ty nang) or (ty xang)) ((co hoi) OR (co loi)). hieu ve chat tuc va thanh san cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((ty nang) OR (ty xang)) ((co hoi) OR (co loi)). hieu ve chat tuc va thanh san cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((ty nang) or (ty xang)) ((co hoi) OR (co loi)). hieu ve chat tuc va thanh san cuu tre".
• Adding a wildcard symbol may retrieve word variants: so sach ((ty nang) or (ty xang)) ((co hoi) OR (co loi)). hieu ve chat tuc va thanh san cuu tre*.