Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, nghiep nganh
hanh trinh » canh tranh, hanh chinh
trinh hoac » trinh hoa, trinh hoan, trinh han
hoac thong » hoa thong, hoac khong, hoc thong
hieu manh » chieu xanh, hien hanh, hieu van
thong tap » thong cap, tong tap, thong tai
tap toan » tap doan, tap quan, bai 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 (dieu hanh))) or (hieu nganh)) - hanh trinh hoac thong thong tap toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((hieu manh) OR (dieu hanh))) OR (hieu nganh)) - hanh trinh hoac thong thong tap toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((((hieu manh) or (dieu hanh))) or (hieu nganh)) - hanh trinh hoac thong thong tap toan cao*.