Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
dan thuoc » dang thuoc, dan thuc, ban thuoc
thuoc cao » thuoc co, thuc cao, thuoc bao
cua triet » cua viet, su triet, va triet
viec dan » viec dang, viec ban, viec dat
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
cao dan » cao dang, cao danh, cac dan
cua tre » cua te, cuu tre, dua tren
dan va » doan va, dan ca, ban 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 ty nang x hoi. nhieu viec dan thuoc cao dan va ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang x hoi. nhieu viec dan thuoc cao dan va ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: te sach ty nang x hoi. nhieu viec dan thuoc cao dan va ((cua tre) or (cua triet))*.