Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hanh trinh » canh tranh, hanh chinh
luat thong » luat thuong, suat thong, xuat thong
hoc thieu » toc thieu, hoc hien
phong van » phung van, thong van, phong va
duong van » duong va, luong va, dang van
toan cao » toan ban, toan tap

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 trinh luat thong ((phong van) or (duong van)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - hanh trinh luat thong ((phong van) OR (duong van)) toan cao*.