Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trang, lanh tranh
hanh trinh » canh tranh, hanh chinh
tieu sang » chieu sang, tieu dung, tiem nang
dung cong » dung trong
vat dung » van dung, va dung, viet dung
cong ban » cong bang, cong san, cong tan
phan lap » phan dau

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 tranh) or (hanh trinh)) vat dung cong ban ((phan lap) or (phan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sang - ((hanh tranh) OR (hanh trinh)) vat dung cong ban ((phan lap) OR (phan tu)).
• Adding a wildcard symbol may retrieve word variants: theo tieu sang - ((hanh tranh) or (hanh trinh)) vat dung cong ban ((phan lap) or (phan tu))*.