Perhaps you should try some spelling variations:
trinh nghiep » trinh nghien, trinh nghe, trinh ghep
hanh trinh » canh tranh, hanh chinh
canh tran » canh tranh, hanh trang, banh trang
thi dich » thi bich, tri dich, tnhh dich
dich hoc » sinh hoc, hinh hoc, tinh hoc
tu hanh » du hanh, lu hanh, thuc hanh
tu canh » thu canh, tu chanh, tu can
ly hoc » y hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu hanh trinh nghiep ((ly hoc) OR (li hoc)) ) or ( tu canh tran thi dich hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu hanh trinh nghiep ((ly hoc) OR (li hoc)) ) OR ( tu canh tran thi dich hoc )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tu hanh trinh nghiep ((ly hoc) OR (li hoc)) ) or ( tu canh tran thi dich hoc ))".
• Adding a wildcard symbol may retrieve word variants: (( tu hanh trinh nghiep ((ly hoc) OR (li hoc)) ) or ( tu canh tran thi dich hoc ))*.