Perhaps you should try some spelling variations:
te sach » toc sach
lua tre » cua tre, dua tren, luat tri
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va, hieu van
luy tre » luyen tre
ly vang » ly hang, ly quang
ly van » le van, ly va, ly von
ve cac » va cac, vien cac
xuc va » duc va, tuc va, luc va
va don » va dong, va doc, va do
x hoi » xa hoi, o hoi, x ho

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 ((ly vang) OR (ly van)) x hoi. hieu ve cac xuc va don vi ((lua tre) or (luy tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ly vang) OR (ly van)) x hoi. hieu ve cac xuc va don vi ((lua tre) OR (luy tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ly vang) OR (ly van)) x hoi. hieu ve cac xuc va don vi ((lua tre) or (luy tre))*".