Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
trinh vat » trinh van, trinh luat, sinh vat
vat nhung » va nhung, vap nhung, vai nhung
hien anh » hien hanh, thien anh, dien anh
van toan » van tuan, van thanh, manh toan
dan than » dan chan, ban than, van than
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 anh - hanh trinh vat nhung cong ((((van toan) OR (van tan))) or (dan than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien anh - hanh trinh vat nhung cong ((((van toan) OR (van tan))) OR (dan than)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien anh - hanh trinh vat nhung cong ((((van toan) OR (van tan))) or (dan than)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc hien anh - hanh trinh vat nhung cong ((((van toan) OR (van tan))) or (dan than)) cau*.