Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hanh trang » thanh trung, canh tranh, minh trang
nghien li » nghiem vi, nghiep ly, nghien o
nguyen li » nguyen ly, nguyen le, nguyen lieu
trang thi » trang thai, tran thi, trang tri
thi dich » thi bich, tri dich, tnhh dich
dich hoc » sinh hoc, hinh hoc, tinh hoc
tu hanh » du hanh, lu hanh, thi hanh
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 ((nghien li) OR (nguyen li)) hoc ) or ( tu hanh trang thi dich hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thuc hanh trinh ((nghien li) OR (nguyen li)) hoc ) OR ( tu hanh trang thi dich hoc )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( thuc hanh trinh ((nghien li) OR (nguyen li)) hoc ) or ( tu hanh trang thi dich hoc ))".
• Adding a wildcard symbol may retrieve word variants: (( thuc hanh trinh ((nghien li) OR (nguyen li)) hoc ) or ( tu hanh trang thi dich hoc ))*.