Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trung tuan » trung thanh, tran tuan, truong thanh
nhung cong » dung cong, thong cong, hang cong
theo sach » thuoc sach, te sach, theo lich
cong tang » cong thang, cong tan, cong lang
tang tao » sang tao, tang tai, nang tao
tao cao » bao cao, toan cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((theo sach) or (chieu sach)) - manh ((trung tuan) OR (trung tam)) nhung cong tang tao cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((theo sach) OR (chieu sach)) - manh ((trung tuan) OR (trung tam)) nhung cong tang tao cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((theo sach) or (chieu sach)) - manh ((trung tuan) OR (trung tam)) nhung cong tang tao cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((theo sach) or (chieu sach)) - manh ((trung tuan) OR (trung tam)) nhung cong tang tao cao*.