Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu tinh » trieu tinh, lieu tinh, chau tinh
hoang van » hang va
dung cong » dung trong
trinh dat » trinh da, trinh dan, trinh dao
lua dung » qua dung, luan hung, qua duong
van lua » van luan, van lu, van luc
dat may » dam may

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sach) or (chieu tinh)) - hoang van lua dung cong trinh dat may~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chieu tinh)) - hoang van lua dung cong trinh dat may*.