Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
trinh cua » tinh cua, trinh luat, trinh quan
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
cong van » cong vang, cong san, song van
ban cao » bao cao, ban co, bac cao
ban can » ban dan, ban hang, ban hanh

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

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