Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hien tinh » khien tinh, thien tinh, bien tinh
trinh cua » tinh cua, trinh luat, trinh quan
nhung van » nhung bai, nhung cau, thong van
dung cong » dung trong
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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 tinh - hanh trinh cua ((((nhung van) OR (phung van))) or (dung cong)) dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien tinh - hanh trinh cua ((((nhung van) OR (phung van))) OR (dung cong)) dan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien tinh - hanh trinh cua ((((nhung van) OR (phung van))) or (dung cong)) dan toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc hien tinh - hanh trinh cua ((((nhung van) OR (phung van))) or (dung cong)) dan toan cao*.