Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
mot chieu » doi chieu, ho chieu
trinh cua » tinh cua, trinh luat, trinh quan
tong cong » trong cong, dung cong, dang cong
cong cong » cong dong, trong cong, dung cong
san toan » van toan, dan toan, 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: ((mot chieu) or (hoc hien)) sach - hanh trinh cua ((tong cong) OR (cong cong)) san toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((mot chieu) OR (hoc hien)) sach - hanh trinh cua ((tong cong) OR (cong cong)) san toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((mot chieu) or (hoc hien)) sach - hanh trinh cua ((tong cong) OR (cong cong)) san toan cao".
• Adding a wildcard symbol may retrieve word variants: ((mot chieu) or (hoc hien)) sach - hanh trinh cua ((tong cong) OR (cong cong)) san toan cao*.