Perhaps you should try some spelling variations:
tinh nghien » trinh nghien, kinh nghiem, tinh nghe
tham nghiem » trac nghiem, thuc nghiem, thi nghiem
sach tham » sach nha
canh tinh » hanh tinh, manh tinh, canh tranh
toc canh » luoc canh, ngoc canh, luc canh
te sach » toc sach
d hoc » du hoc, de hoc, _ hoc
h hoc » _ hoc, o hoc

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 tham nghiem ((d hoc) or (ad hoc)) ) or ( toc canh tinh nghien ((h hoc) OR (y hoc)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach tham nghiem ((d hoc) OR (ad hoc)) ) OR ( toc canh tinh nghien ((h hoc) OR (y hoc)) ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( te sach tham nghiem ((d hoc) or (ad hoc)) ) or ( toc canh tinh nghien ((h hoc) OR (y hoc)) ))*".