Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
thuat bang » thuat ban, thuat mang, thuat nang
hoc thieu » toc thieu, hoc hien
phat bang » phap nang, nhat ban, phap tang
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cap » khan cap, thanh lap, thanh cac

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 - nhanh quang ((phat bang) OR (thuat bang)) cong tan than cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - nhanh quang ((phat bang) OR (thuat bang)) cong tan than cap".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - nhanh quang ((phat bang) OR (thuat bang)) cong tan than cap*.