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