Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hien quan » thien quan, lien quan, vien quan
trinh cua » tinh cua, trinh luat, trinh quan
nong cong » cong cong, tong cong, nang cong
cua nong » cua cong, cuu nong, cua dong
san toan » van toan, dan toan, manh toan
van tan » van tuan, van ban, van tai

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 quan - hanh trinh cua nong cong ((san toan) or (van tan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien quan - hanh trinh cua nong cong ((san toan) OR (van tan)) tap.
• Adding a wildcard symbol may retrieve word variants: hoc hien quan - hanh trinh cua nong cong ((san toan) or (van tan)) tap*.