Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
nong manh » nong lanh, duong manh, hoang manh
van nang » van quang, van ban, van dung
toan cau » toan ban, toan tap, toan tai
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: theo chieu sach - thanh trung ((van nang) or (van dong)) nong manh ((toan cau) OR (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - thanh trung ((van nang) OR (van dong)) nong manh ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - thanh trung ((van nang) or (van dong)) nong manh ((toan cau) OR (toan cao))".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh trung ((van nang) or (van dong)) nong manh ((toan cau) OR (toan cao))*.