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, hanh trang, manh trung
bang duong » bang suong, bang tuong, tang duong
trung cua » truong cua, trung tuan, trung cap
sinh toan » tinh toan, minh toan, sinh ton
hinh toan » tinh toan, thanh toan, trinh toan
cua bang » chua bang, cua ban, cua dang

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