Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhung cong » dung cong, thong cong, hang cong
hoc thien » hoc thieu, hoc thiet, hoc tien
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
ban than » ban thanh, van thanh, ban hang
van than » van thanh, van thang, van tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thien) OR (hoc hien)) hach - thanh trung cua nhung cong ((ban than) or (van than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thien) OR (hoc hien)) hach - thanh trung cua nhung cong ((ban than) OR (van than)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thien) OR (hoc hien)) hach - thanh trung cua nhung cong ((ban than) or (van than)) cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc thien) OR (hoc hien)) hach - thanh trung cua nhung cong ((ban than) or (van than)) cau*.