Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh thong » anh thong, hanh trong, hang thong
hoc thieu » toc thieu, hoc hien
thong qua » thong quan, thong cua, thong tu
ung quang » dung quang, hung quang, vung quang
thanh tap » thanh lap, thanh tai, thanh tay
qua dung » quang dung, su dung, qua song
dung ung » dung cong

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 xanh - hanh thong qua dung ung quang ((thanh tap) or (doanh tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh thong qua dung ung quang ((thanh tap) OR (doanh tai)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh thong qua dung ung quang ((thanh tap) or (doanh tai))*.