Perhaps you should try some spelling variations:
bach tuoc » sach duoc, sach nuoc
hieu viec » nhieu viec, hieu ve, sieu viet
viec bach » vien bach, viec ban, viec bao
thu nang » thi nang, thu hang, thu bang
van hanh » van thanh, ban hanh, van anh
tuoc van » luoc van, quoc van, thuoc von
sach thu » sach thue, sach thieu, sach tham
hanh ca » hanh cac, hanh cat, hanh cua
tu sach » thu sach, su sach, te sach
cua tre » cua te, cuu tre, cua triet
ro hoi » co hoi, mo hoi, ro doi
ca cua » co cua
o hoi » co hoi, o hoc, o hai

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 thu nang ((ro hoi) OR (o hoi)). hieu viec bach tuoc van hanh ca cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thu nang ((ro hoi) OR (o hoi)). hieu viec bach tuoc van hanh ca cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach thu nang ((ro hoi) OR (o hoi)). hieu viec bach tuoc van hanh ca cua tre*.