Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
manh toan » thanh toan, anh tuan, tinh toan
do chinh » hoc chinh, do dinh, te chinh
trinh ve » trinh he, trinh va, trinh vi
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: ((do chinh) OR (mo hinh)) sach - hanh trinh ve ((hang cong) or (dang cong)) manh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((do chinh) OR (mo hinh)) sach - hanh trinh ve ((hang cong) OR (dang cong)) manh toan cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((do chinh) OR (mo hinh)) sach - hanh trinh ve ((hang cong) or (dang cong)) manh toan cao*".