Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
cua triet » cua viet, su triet, va triet
viec dai » vien dai, viec tai, viec dat
thuc cao » thuoc cao, thuc can, thuat cao
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
thuc co » tuc co, thuat co, thuc cua
dan vai » dan va, dan tai, dan vat
vai cua » dai cua, hai cua, lai cua

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 xa hoi. nhieu viec dai ((thuc cao) OR (thuc co)) dan vai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang xa hoi. nhieu viec dai ((thuc cao) OR (thuc co)) dan vai cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang xa hoi. nhieu viec dai ((thuc cao) OR (thuc co)) dan vai cua triet*.