Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thien cac » hien cac, thien cau, thieu cac
tranh cua » doanh cua, manh cua
cua trong » cua truong, cua trung, qua trong
cong bang » cuong bang, dong bang, hong bang
bang phan » nang phan, bang nhan, bang thanh
hieu cac » hieu luc, hieu va, hieu van
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((((thien cac) or (hieu cac))) or (chieu sach)) - canh tranh cua trong cong bang phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((thien cac) OR (hieu cac))) OR (chieu sach)) - canh tranh cua trong cong bang phan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((((thien cac) or (hieu cac))) or (chieu sach)) - canh tranh cua trong cong bang phan cau*.