Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
chat tinh » chau tinh, cham tinh, cha tinh
tong cong » trong cong, cong cong, dung cong
hoc chat » hoc phat, hoc cao, hoc phan
trinh va » trinh van, trinh vat, trinh ve
dan than » dan chan, van than, dan toan
ban than » ban thanh, van thanh, ban hang
va tong » va thong, va tuong, va trong

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chat tinh - hanh trinh va tong cong ((dan than) or (ban than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chat tinh - hanh trinh va tong cong ((dan than) OR (ban than)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc chat tinh - hanh trinh va tong cong ((dan than) or (ban than)) cau*.