Perhaps you should try some spelling variations:
khong duong » khong dung, khong xuong, thong duong
tieu sang » chieu sang, tieu dung, tiem nang
canh manh » lanh manh, canh tranh, cach mang
cua khong » hua khong, cua phuong, cua thuong
duong van » duong va, luong va, dang van
manh cua » doanh cua, ban cua
phan cau » phan dau, phan cac, phan lap

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 - canh manh cua khong duong van ((phan cau) or (phan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sang - canh manh cua khong duong van ((phan cau) OR (phan tu)).
• Adding a wildcard symbol may retrieve word variants: theo tieu sang - canh manh cua khong duong van ((phan cau) or (phan tu))*.