Perhaps you should try some spelling variations:
cong nhanh » cong thanh, cong nhan, cong khanh
hoan chinh » hanh chinh, hoa hinh
hoc chinh » hoc sinh, hoc kinh
dung cong » dung trong
quang cao » nang cao, quang nam
tranh va » tranh van, trang va, trinh va
va dung » van dung, va duong, vat dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc chinh) or (hoan chinh)) sach - canh tranh va dung cong nhanh quang cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chinh) OR (hoan chinh)) sach - canh tranh va dung cong nhanh quang cao.
• Adding a wildcard symbol may retrieve word variants: ((hoc chinh) or (hoan chinh)) sach - canh tranh va dung cong nhanh quang cao*.