Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
bang cong » dang cong, bang song, hang cong
hoa chat » hop chat, hoa phan
chat lua » chat cua, chat va, chat huu
lua bang » lua sang, luu bang, luan nang
cong tac » cong ty
tac phi » tac thi, tac phu, tac pham
phi phi » chi phi, phi thi, thi phi

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 (cuu tinh)) - hoa chat lua bang cong tac phi phi~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sach) OR (cuu tinh)) - hoa chat lua bang cong tac phi phi".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) OR (cuu tinh)) - hoa chat lua bang cong tac phi phi*.