Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
thu sach » thuat sach, thuoc sach, thu hoach
danh vai » danh sai, danh va, dang van
tu sach » su sach, te sach, tu cach
cac xuc » cam xuc, cac nuoc, chat xuc
cuu tre » cua tre, cau tren, cau treo
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
xuc va » duc va, tuc va, luc va
ve cac » va cac, vien cac

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) or (thu sach)) ty nang xa hoi. hieu ve cac xuc va ((danh vai) OR (doanh van)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ty nang xa hoi. hieu ve cac xuc va ((danh vai) OR (doanh van)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) ty nang xa hoi. hieu ve cac xuc va ((danh vai) OR (doanh van)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ty nang xa hoi. hieu ve cac xuc va ((danh vai) OR (doanh van)) cuu tre*.