Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, thi chieu
ganh nang » anh nang, nganh nong, van nang
van duong » van dong, van dung, van phong
cong hach » cong sach, cong thanh, cong khanh
hach toan » thanh toan, manh toan
theo chu » cho chu, chao chu, theo yeu
toan cau » 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: ((theo chieu) OR (theo chu)) hanh - ganh nang ((va ung) or (van duong)) cong hach toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (theo chu)) hanh - ganh nang ((va ung) OR (van duong)) cong hach toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) OR (theo chu)) hanh - ganh nang ((va ung) or (van duong)) cong hach toan cau".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) OR (theo chu)) hanh - ganh nang ((va ung) or (van duong)) cong hach toan cau*.