Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hien sach » dien sach, kien sach, thien hach
canh manh » lanh manh, canh tranh, cach mang
hang cong » dang cong, hang nong, bang cong
van nhanh » van thanh, van hanh, van khanh
nhanh cau » nhanh cay, thanh chau, nhanh ha
manh cua » doanh cua, ban cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien sach - canh manh cua ((thong cong) or (hang cong)) van nhanh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien sach - canh manh cua ((thong cong) OR (hang cong)) van nhanh cau.
• Adding a wildcard symbol may retrieve word variants: hoc hien sach - canh manh cua ((thong cong) or (hang cong)) van nhanh cau*.