Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
trinh toan » tinh toan, thanh toan, trinh han
doi chieu » doc hieu, doi chi, mot chieu
va trong » va truong, va thong, va tuong
toan tap » toan ban
tung va » trung va, tuong va, dung va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sach - thanh tung va trong cong trinh toan tap~.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh tung va trong cong trinh toan tap*.