Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hanh tranh » canh tranh, hanh trang, lanh tranh
thong cong » trong cong, tong cong, thong thong
hoc thiet » hoc thieu, hoc thuyet, toc thieu
cua thong » cua thuong, cua khong, cua tong
cong dan » cong san, cong tan, huong dan
dan han » dan chan, dan than, dan hanh
han tap » han tai, toan tap, nhan 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 thiet) or (hoc hien)) anh - ((hanh tranh) OR (hanh trinh)) cua thong cong dan han tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thiet) OR (hoc hien)) anh - ((hanh tranh) OR (hanh trinh)) cua thong cong dan han tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thiet) or (hoc hien)) anh - ((hanh tranh) OR (hanh trinh)) cua thong cong dan han tap".
• Adding a wildcard symbol may retrieve word variants: ((hoc thiet) or (hoc hien)) anh - ((hanh tranh) OR (hanh trinh)) cua thong cong dan han tap*.