Perhaps you should try some spelling variations:
trong doanh » trong nganh
thieu sang » chieu sang, thieu khang, thieu quang
hanh trinh » canh tranh, hanh chinh
hoc thieu » toc thieu, hoc hien
cong doan » cong dan, cong hoan, dong doanh
trinh va » trinh van, trinh vat, trinh ve
va tong » va thong, va tuong, va trong

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 va tong ((cong doan) or (trong doanh)) van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - hanh trinh va tong ((cong doan) OR (trong doanh)) van ban.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh trinh va tong ((cong doan) or (trong doanh)) van ban*.