Perhaps you should try some spelling variations:
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
anh via » anh va, anh bia, anh viet
via cua » gia cua, gian cua, giau cua
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac
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 ve cac ((xuc van) OR (duc van)) anh via cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((x hoi) OR (o hoi)). hieu ve cac ((xuc van) OR (duc van)) anh via cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((x hoi) or (o hoi)). hieu ve cac ((xuc van) OR (duc van)) anh via cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((x hoi) or (o hoi)). hieu ve cac ((xuc van) OR (duc van)) anh via cua tre*.