Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
canh manh » lanh manh, canh tranh, cach mang
cua nhung » va nhung
huong van » huong dan, hong van, luong van
duong van » duong va, luong va, dang van
manh cua » doanh cua, ban cua
toan cao » toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - canh manh cua nhung ((huong van) OR (duong van)) toan cao~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - canh manh cua nhung ((huong van) or (duong van)) toan cao*.