Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh hoa » trinh do, trinh han
toc hanh » hoc hanh, doc hanh, tuc hanh
lan dao » lanh dao, van dao, lan dau
dao cao » dao tao, bao cao, tao cao
cao khi » cao khai, co khi, cao thi
hoa khi » hoa phi, hoa hi, hoa thi
te lan » te luan, te ban, te lai

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( te lan dao cao khi đong luc ) or ( toc hanh trinh hoa khi đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te lan dao cao khi đong luc ) OR ( toc hanh trinh hoa khi đong luc )).
• Adding a wildcard symbol may retrieve word variants: (( te lan dao cao khi đong luc ) or ( toc hanh trinh hoa khi đong luc ))*.