Perhaps you should try some spelling variations:
tham nghiem » thuc nghiem, thi nghiem, thu nghiem
sach trinh » sach tranh, hanh trinh, sach kinh
trinh chat » tinh chat, trinh luat, trinh han
te sach » toc sach
chat xe » chat deo, chat xuc, chat beo
vu sach » vu bach, su sach, vu khach
van hoc » van hoa
xe hoc » te hoc, de hoc, xa 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 trinh chat xe hoc ) or ( vu sach ((tham nghiem) OR (trac nghiem)) van hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach trinh chat xe hoc ) OR ( vu sach ((tham nghiem) OR (trac nghiem)) van hoc ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( te sach trinh chat xe hoc ) or ( vu sach ((tham nghiem) OR (trac nghiem)) van hoc ))*".