Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
thanh tung » thanh cong
trong dong » trong cong, trong nong, trong dang
dong toan » dung toan, bong toan, cong toan
ho chieu » hoc thieu, doi chieu, mot chieu
vat dung » van dung, va dung, viet dung
toan cau » 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: ((ho chieu) OR (theo chieu)) sach - ((thanh trung) or (thanh tung)) vat dung trong dong toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo chieu)) sach - ((thanh trung) OR (thanh tung)) vat dung trong dong toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (theo chieu)) sach - ((thanh trung) or (thanh tung)) vat dung trong dong toan cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (theo chieu)) sach - ((thanh trung) or (thanh tung)) vat dung trong dong toan cau*.