Perhaps you should try some spelling variations:
dinh vai » dinh van, dinh vi, dinh va
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
va dinh » van dinh, va kinh, va tinh
vai cuu » vai cua
cuu tre » cua tre, cau tren, cau treo
cac tu » cac thu, cach tu, cac du
x hoi » xa hoi, x ho, 5 hoi
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: te sach ky nang ((x hoi) OR (o hoi)). hieu va cac tu va dinh vai cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((x hoi) OR (o hoi)). hieu va cac tu va dinh vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((x hoi) OR (o hoi)). hieu va cac tu va dinh vai cuu tre*.