Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
hanh dong » anh dong
luan nang » luan van, van nang, luan san
nang cong » nang song, dang cong, bang cong
cong van » cong vang, cong san, song van
ha dong » hoat dong, van dong
van tai » von tai, van tuan
tai cau » tai cac, tai cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu xanh) or (chieu sang)) - ((hanh dong) or (ha dong)) luan nang cong van tai cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (chieu sang)) - ((hanh dong) OR (ha dong)) luan nang cong van tai cau.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) or (chieu sang)) - ((hanh dong) or (ha dong)) luan nang cong van tai cau*.