Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
day thanh » dao thanh, dat thanh, da thanh
thuc day » thuc dan, thuc vat
dai thuc » dan thuc, dai thu, dai thua
viec dai » vien dai, viec tai, viec dat
tu sach » thu sach, su sach, tu cach
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
te sach » toc sach
di cua » doi cua, de cua, do cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (te sach)) ky lang xa hoi. hieu viec dai thuc day thanh ((di cua) OR (dai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky lang xa hoi. hieu viec dai thuc day thanh ((di cua) OR (dai cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) ky lang xa hoi. hieu viec dai thuc day thanh ((di cua) OR (dai cua)) te".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky lang xa hoi. hieu viec dai thuc day thanh ((di cua) OR (dai cua)) te*.