Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
luat dung » suat dung, luat chung, luat quang
dung cong » dung trong
cong do » cuong do, cong dot, cong so
do van » dao van, vo van, so van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu nganh) or (chieu sach)) - hanh trinh luat dung cong do van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu nganh) OR (chieu sach)) - hanh trinh luat dung cong do van ban.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu nganh) or (chieu sach)) - hanh trinh luat dung cong do van ban*.