Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
quang cong » quang cuong, quang dong, quang hoang
trung dat » trong dat, trung dam, truong dai
trung dai » truong dai, truong dao, trung tam
ho chieu » theo chieu, hoc thieu, doi chieu
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than cap » khan cap, thanh lap, thanh cac

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - thanh ((trung dat) OR (trung dai)) quang cong tac than cap~".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh ((trung dat) OR (trung dai)) quang cong tac than cap*.