Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hanh trang » thanh trung, canh tranh, minh trang
hoc thiet » hoc thieu, hoc thuyet, toc thieu
cong cong » cong dong, trong cong, dung cong
cong san » cong tac
san ban » sang ban, van ban, can ban
ban ban » ban banh, van ban, can ban

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) or (hoc thiet)) anh - ((hanh trang) or (hanh trinh)) cua cong cong san ban ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hien) OR (hoc thiet)) anh - ((hanh trang) OR (hanh trinh)) cua cong cong san ban ban.
• Adding a wildcard symbol may retrieve word variants: ((hoc hien) or (hoc thiet)) anh - ((hanh trang) or (hanh trinh)) cua cong cong san ban ban*.