Perhaps you should try some spelling variations:
tieu sang » chieu sang, tieu dung, tiem nang
hang cong » dang cong, hang nong, bang cong
cong manh » cong danh, duong manh, cong thanh
chinh va » chinh tai, hanh va, tinh va
chinh ta » chinh tai, chinh tri
toan cao » toan ban
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sang - hanh ((chinh va) or (chinh ta)) hang cong manh ((toan cao) OR (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sang - hanh ((chinh va) OR (chinh ta)) hang cong manh ((toan cao) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sang - hanh ((chinh va) or (chinh ta)) hang cong manh ((toan cao) OR (toan tap))".
• Adding a wildcard symbol may retrieve word variants: theo tieu sang - hanh ((chinh va) or (chinh ta)) hang cong manh ((toan cao) OR (toan tap))*.