Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
hanh trinh » canh tranh, hanh chinh
hieu manh » chieu xanh, hieu nganh, dieu hanh
thien anh » thien danh, tien anh, thien chanh
thong dan » thong van, tuong dan, thong den
trinh va » trinh van, trinh vat, trinh ve
va thong » va thuong, va phuong, he thong
dan toan » van toan, dan than, 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: hoc ((hieu manh) or (((thien anh) or (thien thanh)))) - hanh trinh va thong thong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (((thien anh) OR (thien thanh)))) - hanh trinh va thong thong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (((thien anh) or (thien thanh)))) - hanh trinh va thong thong dan toan cao*.