Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
trinh nghe » trinh nghien, trinh he, trinh nha
kinh chao » trinh chao, tinh chat, minh chau
nghe dien » nghe tieng, nghe dan, nghe hieu
thu sach » tu sach, thuat sach, thuoc sach
dien hoc » dien hoa, khien hoc, tin hoc
chao li » hao li
tu canh » thu canh, tu chanh, tu can

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thu sach kinh chao li hoc ) or ( tu canh trinh nghe dien hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu sach kinh chao li hoc ) OR ( tu canh trinh nghe dien hoc )).
• Adding a wildcard symbol may retrieve word variants: (( thu sach kinh chao li hoc ) or ( tu canh trinh nghe dien hoc ))*.