Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
dang cong » dung cong
tuong va » truong va, thuong va, luong va
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cao » toan ban, toan tap
tung va » trung va, vung va, cung 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 - thanh ((((tung va) or (dung va))) or (tuong va)) dang cong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh ((((tung va) OR (dung va))) OR (tuong va)) dang cong tan toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh ((((tung va) or (dung va))) or (tuong va)) dang cong tan toan cao*.