Perhaps you should try some spelling variations:
ngang thanh » nang thanh, nganh thanh, ngan thanh
thieu sang » chieu sang, thieu khang, thieu quang
cong ngang » cong nhan, cong quang, cong lang
hoc thieu » toc thieu, hoc hien
trong nam » thong nam, trong lam, trong cac
dung cong » dung trong
thanh mau » hanh mau, thanh san, thanh hai
thong va » trong va, thong cua, truong va

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 ((trong nam) or (thong va)) dung cong ngang thanh mau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - hanh ((trong nam) OR (thong va)) dung cong ngang thanh mau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh ((trong nam) or (thong va)) dung cong ngang thanh mau*.