Perhaps you should try some spelling variations:
thien chanh » thien thanh, thien chinh, hien hanh
hanh trinh » canh tranh, hanh chinh
thien anh » thien danh, tien anh, thien thanh
dung cong » dung trong
trinh va » trinh van, trinh vat, trinh ve
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cao » toan ban, toan tap
va dung » van dung, va duong, vat dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thien anh) or (thien chanh)) - hanh trinh va dung cong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien anh) OR (thien chanh)) - hanh trinh va dung cong tan toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien anh) or (thien chanh)) - hanh trinh va dung cong tan toan cao*.