Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
thien anh » thien danh, tien anh, thien thanh
tranh cua » doanh cua, manh cua
dung cong » dung trong
cong toan » cong tan, cong hoan, cong tuan
cua dung » cua dang, cua dong, qua dung
phan dau » hang dau

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 anh) or (chieu tinh)) - canh tranh cua dung cong toan ((phan tu) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien anh) OR (chieu tinh)) - canh tranh cua dung cong toan ((phan tu) OR (phan dau)).
• Adding a wildcard symbol may retrieve word variants: hoc ((thien anh) or (chieu tinh)) - canh tranh cua dung cong toan ((phan tu) or (phan dau))*.