Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh nghe » trinh nghien, trinh he, trinh nha
canh trinh » canh tranh, canh tinh, anh trinh
trinh thi » trinh tai, dinh thi, trinh tu
nghe di » nghe vi, nghe dien, nghe dan
tu canh » thu canh, tu chanh, tu can
thi diu » thi dieu, thi dau, thi du
diu hoc » du hoc, dia hoc, lieu hoc
di hoc » dai hoc, dia hoc, li hoc
thuc » thu

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thuc hanh trinh nghe di hoc ) or ( tu canh trinh thi diu hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thuc hanh trinh nghe di hoc ) OR ( tu canh trinh thi diu hoc )).
• Adding a wildcard symbol may retrieve word variants: (( thuc hanh trinh nghe di hoc ) or ( tu canh trinh thi diu hoc ))*.