Perhaps you should try some spelling variations:
te sach » toc sach
lua tre » cua tre, dua tren, luat tri
luy tre » luyen tre
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
xuc va » duc va, luc va, xac va
y nang » ky nang, ly nang, v nang
tuc va » thuc va, truc va, tuc xa
dan vi » doan vi, don vi, dan va
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 ((xuc va) or (tuc va)) dan vi ((lua tre) 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 ((xuc va) OR (tuc va)) dan vi ((lua tre) OR (luy tre)).
• Adding a wildcard symbol may retrieve word variants: te sach y nang x hoi. hieu ve cac ((xuc va) or (tuc va)) dan vi ((lua tre) or (luy tre))*.