Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
tu sach » thu sach, su sach, te sach
van cuu » van cau, van chu, van cu
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
ly hang » ly quang
ty nang » ky nang, ty xang, ty hang
cuu tre » cua tre, cau tren, cau treo
loc va » hoc va, luc va

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 (ly hang)) xa hoi. hieu ve cham ((loc va) or (duc va)) doanh van cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ly hang)) xa hoi. hieu ve cham ((loc va) OR (duc va)) doanh van cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) or (ly hang)) xa hoi. hieu ve cham ((loc va) or (duc va)) doanh van cuu tre*.