Perhaps you should try some spelling variations:
trinh vant » trinh vat, trinh han, trinh viet
hang huong » hang thuong, hang luong, hoang phuong
huong doan » phuong doan, huong dan, huong loan
hien hanh » dieu hanh
trinh van » trinh han, trinh quan, trinh toan
doan phan » doanh phan, toan phan, dan phan
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien hanh - canh ((trinh van) or (trinh vant)) hang huong doan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hanh - canh ((trinh van) OR (trinh vant)) hang huong doan phan cau.
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - canh ((trinh van) or (trinh vant)) hang huong doan phan cau*.