Perhaps you should try some spelling variations:
te sach » toc sach
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
ve cac » va cac, vien cac
y nang » ky nang, ly nang, v nang
xuc va » duc va, tuc va, luc va
va dan » ca dan, va dao, va dau
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: te sach y nang ((x hoi) or (o hoi)). hieu ve cac xuc va dan ((vi lua) OR (vi luu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ((x hoi) OR (o hoi)). hieu ve cac xuc va dan ((vi lua) OR (vi luu)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ((x hoi) or (o hoi)). hieu ve cac xuc va dan ((vi lua) OR (vi luu)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ((x hoi) or (o hoi)). hieu ve cac xuc va dan ((vi lua) OR (vi luu)) tre*.