Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, theo chu, thi chieu
hoc thieu » toc thieu, hoc hien
trung xay » trong xay, trung gay, trung tam
trong bai » trong ban, thong bai, trong hai
ho chieu » doi chieu, mot chieu, thi chieu
bai toan » bai tap
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 (hoc thieu))) or (theo chieu)) sach - thanh trung xay dung trong bai toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((ho chieu) OR (hoc thieu))) OR (theo chieu)) sach - thanh trung xay dung trong bai toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((ho chieu) OR (hoc thieu))) or (theo chieu)) sach - thanh trung xay dung trong bai toan cau".
• Adding a wildcard symbol may retrieve word variants: ((((ho chieu) OR (hoc thieu))) or (theo chieu)) sach - thanh trung xay dung trong bai toan cau*.