Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trinh xay » trinh ky
dung cong » dung trong
van thanh » ban thanh
ho chieu » theo chieu, hoc thieu, doi chieu
tran xay » tra xay, tran day, tran xuan
van tuan » van quan, van ban, anh tuan

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 ((tran xay) OR (trinh xay)) dung cong ((van thanh) or (van tuan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hanh ((tran xay) OR (trinh xay)) dung cong ((van thanh) OR (van tuan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - hanh ((tran xay) OR (trinh xay)) dung cong ((van thanh) or (van tuan)) cau".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh ((tran xay) OR (trinh xay)) dung cong ((van thanh) or (van tuan)) cau*.