Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh thi » trinh tai, dinh thi, trinh tu
hanh cong » thanh cong, hang cong, nhanh chong
hanh dong » anh dong, ha dong
tuan tap » tuan tai, tuyen tap, toan tai
toan tap » toan ban
ha tinh » va tinh, may tinh
ho ha » pho ha, ho hap, o ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ha tinh - hanh trinh thi ((hanh cong) OR (hanh dong)) van ((tuan tap) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ha tinh - hanh trinh thi ((hanh cong) OR (hanh dong)) van ((tuan tap) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ha tinh - hanh trinh thi ((hanh cong) OR (hanh dong)) van ((tuan tap) or (toan tap))".
• Adding a wildcard symbol may retrieve word variants: ho ha tinh - hanh trinh thi ((hanh cong) OR (hanh dong)) van ((tuan tap) or (toan tap))*.