Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thuc chung » thuc cung, thuc nhung, thung chung
chung cong » nhung cong, chong cong, phung cong
lieu tinh » trieu tinh, diep tinh, bien tinh
cong than » cong thanh, cong thang, cong tan
than phan » thanh phan, toan phan, thanh pham
phan cac » nhan cach, phan dau, phan lap
tinh am » tinh nam, tinh cam, tinh cham

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((lieu tinh) or (chieu sach)) - ((tinh am) OR (tinh amin)) thuc chung cong than phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((lieu tinh) OR (chieu sach)) - ((tinh am) OR (tinh amin)) thuc chung cong than phan cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((lieu tinh) or (chieu sach)) - ((tinh am) OR (tinh amin)) thuc chung cong than phan cac".
• Adding a wildcard symbol may retrieve word variants: hoc ((lieu tinh) or (chieu sach)) - ((tinh am) OR (tinh amin)) thuc chung cong than phan cac*.