Perhaps you should try some spelling variations:
thieu sach » chieu sach, hieu cach, theo sach
thien hach » thien thanh, hien hanh
tinh trang » minh trang, tinh quang, tinh toan
khong cong » thong cong, khong cang, chong cong
hua khong » hoa khong, cua khong, hoac khong
ban thanh » ban hanh, ban hang
thanh ban » thanh san, thanh van, thanh bac
cong ban » cong bang, cong san, cong tan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu sach) OR (thien hach)) - ((tinh trang) or (canh tranh)) hua khong cong ban thanh ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (thien hach)) - ((tinh trang) OR (canh tranh)) hua khong cong ban thanh ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) OR (thien hach)) - ((tinh trang) or (canh tranh)) hua khong cong ban thanh ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) OR (thien hach)) - ((tinh trang) or (canh tranh)) hua khong cong ban thanh ban*.