Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
cuong dung » tuong duong, ung dung, thong dung
hoc chiet » hoc thiet, hoc nhiet, hoc hien
manh tinh » man tinh, manh binh, canh tinh
trong van » trong cac
van toan » van tuan, van tan, van thanh
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: hoc chiet tach - ((manh tinh) or (hanh trinh)) cuong dung trong van toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chiet tach - ((manh tinh) OR (hanh trinh)) cuong dung trong van toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - ((manh tinh) or (hanh trinh)) cuong dung trong van toan cau*.