Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trinh cua » trinh luat, trinh quan, trinh luan
cong vang » cong lang, cong quang, cong ngang
ho chieu » theo chieu, hoc thieu, doi chieu
tinh cua » sinh cua, tinh chat, tranh cua
cong van » cong san, song van, cong tan
tan tai » toan tai, tang tai, tuan tai

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 cua) or (tinh cua)) nhung ((cong van) or (cong vang)) tan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hanh ((trinh cua) OR (tinh cua)) nhung ((cong van) OR (cong vang)) tan tai.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh ((trinh cua) or (tinh cua)) nhung ((cong van) or (cong vang)) tan tai*.