Perhaps you should try some spelling variations:
doanh va » doan va, doanh tai, doanh cua
doanh ca » doanh cua, doanh cao, danh ca
tu sach » thu sach, su sach, te sach
cham lo » cham o, cam lo, cham soc
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
ty nang » ky nang, ty hang, ly nang
cua tre » cua te, cuu tre, cua triet
lo va » lo van, lao va, ly 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 (ty xang)) xa hoi. hieu ve cham lo va ((doanh ca) OR (doanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ty xang)) xa hoi. hieu ve cham lo va ((doanh ca) OR (doanh va)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) or (ty xang)) xa hoi. hieu ve cham lo va ((doanh ca) OR (doanh va)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) or (ty xang)) xa hoi. hieu ve cham lo va ((doanh ca) OR (doanh va)) cua tre*.