Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
nhung cong » dung cong, thong cong, hang cong
hanh tang » hanh trang, anh tang, hanh tung
hanh mang » nhanh mang, hanh trang, nhanh lang
cua nhung » va nhung
hoc hieu » hoc thieu, hoc hien, doc hieu
cong van » cong vang, cong san, song van
van tan » van tuan, van ban, van tai
tan ban » toan ban, tang ban, van ban

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 tang) or (hanh mang)) cua nhung cong van tan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu nganh - ((hanh tang) OR (hanh mang)) cua nhung cong van tan ban*.