Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
nam thuc » nam thuoc, am thuc, nam thu
tinh hoc » sinh hoc, tin hoc, hinh hoc
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
cam tuc » cam xuc, cam tu, dam thuc
cua tre » cua te, cuu tre, cua triet

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 _ lang xa hoi. nhieu viec ((cam tuc) OR (nam thuc)) may tinh hoc cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach _ lang xa hoi. nhieu viec ((cam tuc) OR (nam thuc)) may tinh hoc cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach _ lang xa hoi. nhieu viec ((cam tuc) OR (nam thuc)) may tinh hoc cua tre*.