Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hanh trinh » hanh chinh
hoc thieu » toc thieu, hoc hien
chung han » chung nhan, chung than, chuong han
cua dong » chua dong, cua cong, cua nong
cua dang » cua cong, cua ban
han than » khan than, phan than, ban than
than man » than ma, thanh san, tran manh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu sang - ((hanh trinh) or (canh tranh)) ((cua dong) OR (cua dang)) chung han than man~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - ((hanh trinh) OR (canh tranh)) ((cua dong) OR (cua dang)) chung han than man.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - ((hanh trinh) or (canh tranh)) ((cua dong) OR (cua dang)) chung han than man".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - ((hanh trinh) or (canh tranh)) ((cua dong) OR (cua dang)) chung han than man*.