Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
hanh trinh » canh tranh, hanh chinh
hanh tuong » manh tuong, hanh trong, hanh tung
trinh thi » trinh tai, dinh thi, trinh tu
tuong dan » huong dan, tung dan, xuong dan
hoc hieu » hoc thieu, hoc hien, doc hieu
thi hanh » thi thanh
dan than » dan chan, ban than, van than
than ban » thanh ban, toan ban, than man

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 nganh - hanh trinh thi hanh tuong dan than ban~.
• Adding a wildcard symbol may retrieve word variants: hoc hieu nganh - hanh trinh thi hanh tuong dan than ban*.