Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
chat doc » chat hoc, chau doc, thuat doc
ve chat » va chat, van chat
lai cua » hai cua, lai chau, thai cua
doc van » do van, hoc van, duc van
tu sach » thu sach, su sach, te sach
ty hang » ly hang, ty xang, thi hang
ty nang » ky nang, ty xang, ly nang
hieu ve » hieu va, hieu van

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)) xa hoi. hieu ve chat doc van thanh ((lai cua) or (dai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ty hang)) xa hoi. hieu ve chat doc van thanh ((lai cua) OR (dai cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) OR (ty hang)) xa hoi. hieu ve chat doc van thanh ((lai cua) or (dai cua)) triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) OR (ty hang)) xa hoi. hieu ve chat doc van thanh ((lai cua) or (dai cua)) triet*.