Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
thien anh » thien danh, tien anh, thien thanh
van dung » van dong, xay dung, tin dung
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban
va dung » va duong, vat dung, va ung

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thi thanh) or (thien anh)) - hanh trinh ((va dung) OR (van dung)) cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thi thanh) OR (thien anh)) - hanh trinh ((va dung) OR (van dung)) cong san toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thi thanh) or (thien anh)) - hanh trinh ((va dung) OR (van dung)) cong san toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thi thanh) or (thien anh)) - hanh trinh ((va dung) OR (van dung)) cong san toan ban*.