Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thu nang » thi nang, thu hang, thu bang
danh vai » danh sai, danh va, doanh van
cham xuc » cam xuc, chat xuc, cham soc
sach thu » sach thue, sach thieu, sach tham
su sach » so sach, vu sach
vai cuu » vai cua
va danh » va dinh, va dan, va hanh
cuu tre » cua tre, cau tren, cau treo
hieu ve » hieu va
xuc va » duc va, tuc va, luc va
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach thu nang ((x hoi) OR (o hoi)). ((hieu ve) or (hieu van)) cham xuc va danh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thu nang ((x hoi) OR (o hoi)). ((hieu ve) OR (hieu van)) cham xuc va danh vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach thu nang ((x hoi) OR (o hoi)). ((hieu ve) or (hieu van)) cham xuc va danh vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: su sach thu nang ((x hoi) OR (o hoi)). ((hieu ve) or (hieu van)) cham xuc va danh vai cuu tre*.