Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hieu manh » chieu xanh, hieu nganh, dieu hanh
trung cap » truong cao, trung tam
dung cong » dung trong
trinh han » trinh quan
trung ap » trung lap, trung tam, trung dai
han cap » hanh cap, khan cap, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu manh) or (chieu sach)) - hanh ((trung ap) OR (trung cap)) dung cong trinh han cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu manh) OR (chieu sach)) - hanh ((trung ap) OR (trung cap)) dung cong trinh han cap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu manh) or (chieu sach)) - hanh ((trung ap) OR (trung cap)) dung cong trinh han cap*".