Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
manh trung » manh tung, thanh trung, manh hung
trung tuan » trung thanh, trung tam, tran tuan
bang suong » bang song, bang tuong, bang phuong
hoc thieu » toc thieu, hoc hien
toan cao » toan ban, toan tap

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 - manh trung tuan ((bang suong) or (tuong duong)) tinh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - manh trung tuan ((bang suong) OR (tuong duong)) tinh toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - manh trung tuan ((bang suong) or (tuong duong)) tinh toan cao*.