Perhaps you should try some spelling variations:
dua tren » dung tren
te sach » toc sach
va doan » va doanh, van doan, va dan
lua tre » cua tre, luat tri
doan vi » doan va, don vi, doan thi
cac luc » cau luc, coc luc, cac nuoc
hieu ve » hieu va, hieu van
luy tre » luyen tre
luc va » duc va, tuc va, loc va
ve cac » va cac, vien cac
y nang » ky nang, ly nang, v nang
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 y nang x hoi. hieu ve cac luc va doan vi ((((lua tre) OR (dua tren))) or (luy tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang x hoi. hieu ve cac luc va doan vi ((((lua tre) OR (dua tren))) OR (luy tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang x hoi. hieu ve cac luc va doan vi ((((lua tre) OR (dua tren))) or (luy tre))".
• Adding a wildcard symbol may retrieve word variants: te sach y nang x hoi. hieu ve cac luc va doan vi ((((lua tre) OR (dua tren))) or (luy tre))*.