Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu tinh » trieu tinh, lieu tinh, chau tinh
trong dat » trong dam, trong dan, trong dao
hoa chat » hop chat, hoa phan
chat lua » chat cua, chat va, chat huu
lua dung » qua dung, luan hung, qua duong
dat phan » data phan, dam phan, sat phan
phan lap » phan dau

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)) - hoa chat lua dung trong dat phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chieu tinh)) - hoa chat lua dung trong dat phan lap.
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) or (chieu tinh)) - hoa chat lua dung trong dat phan lap*.