Perhaps you should try some spelling variations:
thanh trung » thanh tung
doi chieu » doc hieu, doi chi, mot chieu
trung vat » trung va, trung van, trong vat
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, mot chieu
vat dung » van dung, va dung, viet dung
cong tan » cong tac, cong san, cong thanh
phan cau » phan dau, phan cac, phan tu
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 (doi chieu)) sach - thanh trung vat dung cong tan ((phan cau) or (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) sach - thanh trung vat dung cong tan ((phan cau) OR (toan cau)).
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) sach - thanh trung vat dung cong tan ((phan cau) or (toan cau))*.