Perhaps you should try some spelling variations:
doanh va » doan va, doanh tai, doanh cua
lky nang » ly nang, ki nang, ke nang
tu sach » thu sach, su sach, te sach
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
cuu va » cuu ve
va cua » va chua, via cua, ca cua

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 ((ky nang) or (lky nang)) xa hoi. hieu ve cham ((cuu va) OR (cuu van)) doanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky nang) OR (lky nang)) xa hoi. hieu ve cham ((cuu va) OR (cuu van)) doanh va cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky nang) or (lky nang)) xa hoi. hieu ve cham ((cuu va) OR (cuu van)) doanh va cua tre*".