Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
dong thanh » truong thanh
thanh toan » thanh hoa, thanh san, tinh toan
hoc thieu » toc thieu, hoc hien
trinh vat » trinh van, trinh luat, sinh vat
trinh va » trinh van, trinh ve, trinh vi
ung dong » vung dong, dung dong, nung dong
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 ((trinh va) OR (trinh vat)) ung dong thanh toan cao~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - canh ((trinh va) or (trinh vat)) ung dong thanh toan cao*.