Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hanh tranh » hanh trinh, hanh trang, lanh tranh
thanh phan » thanh pho, thanh san, thanh toan
hoc thieu » toc thieu, hoc hien
cua nhung » va nhung
don ban » dong ban, doi ban, con ban
do ban » doi ban, co ban, do ben

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 tranh) or (canh tranh)) cua nhung ((don ban) OR (do ban)) thanh phan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - ((hanh tranh) OR (canh tranh)) cua nhung ((don ban) OR (do ban)) thanh phan.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - ((hanh tranh) or (canh tranh)) cua nhung ((don ban) OR (do ban)) thanh phan".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - ((hanh tranh) or (canh tranh)) cua nhung ((don ban) OR (do ban)) thanh phan*.