Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
trinh vat » trinh van, trinh luat, sinh vat
san trung » van trung, sinh trung, van truong
ho chieu » theo chieu, hoc thieu, doi chieu
trinh ve » trinh he, trinh va, trinh vi
ban tran » ban trang, tan tran, ban than

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 sach - hanh ((trinh vat) or (trinh ve)) thong cong ((san trung) or (ban tran)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hanh ((trinh vat) OR (trinh ve)) thong cong ((san trung) OR (ban tran)) ban.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh ((trinh vat) or (trinh ve)) thong cong ((san trung) or (ban tran)) ban*.