Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh tin » trinh kinh, trinh toan, trinh tu
dung cong » dung trong
cong van » cong vang, cong san, song van
tang tai » hang tai, dung tai, dong tai
sang tao » hang tai
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 tin dung cong van ((tang tai) or (sang tao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ha tinh - hanh trinh tin dung cong van ((tang tai) OR (sang tao))*.