Perhaps you should try some spelling variations:
thieu sach » chieu sach, hieu cach, theo sach
thien hach » thien thanh, hien hanh
hanh trung » thanh trung, manh trung, danh trung
hanh trang » thanh trung, canh tranh, hanh trinh
tuong cong » truong cong, trong cong, tong cong
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
ba tuong » ban tuong, bao tuong, va tuong
toan ban » van ban

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)) - ((hanh trung) or (hanh trang)) ba tuong cong manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (thien hach)) - ((hanh trung) OR (hanh trang)) ba tuong cong manh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) OR (thien hach)) - ((hanh trung) or (hanh trang)) ba tuong cong manh toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) OR (thien hach)) - ((hanh trung) or (hanh trang)) ba tuong cong manh toan ban*.