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

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 lang) OR (ty xang)) xa hoi. nhieu viec dai ((thuc cao) or (thuc co)) dan vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ty lang) OR (ty xang)) 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 lang) OR (ty xang)) 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 lang) OR (ty xang)) xa hoi. nhieu viec dai ((thuc cao) or (thuc co)) dan vai cua triet*.