Perhaps you should try some spelling variations:
thi nghiep » khoi nghiep, thai nghien, tot nghiep
thi nghiem » thuc nghiem
xi nghiep » su nghiep
nghiem d » nghiem de, nghiem do, nghiem _
thu sach » tu sach, thuat sach, thuoc sach
cac thi » cac thoi, cau thi, can thi
va hoc » van hoc
d hoc » du hoc, ad hoc, de hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu cac thi nghiem d hoc ) or ( thu sach ((thi nghiep) OR (xi nghiep)) va hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu cac thi nghiem d hoc ) OR ( thu sach ((thi nghiep) OR (xi nghiep)) va hoc )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tu cac thi nghiem d hoc ) or ( thu sach ((thi nghiep) OR (xi nghiep)) va hoc ))".
• Adding a wildcard symbol may retrieve word variants: (( tu cac thi nghiem d hoc ) or ( thu sach ((thi nghiep) OR (xi nghiep)) va hoc ))*.