Perhaps you should try some spelling variations:
thien tinh » thien minh, tien tinh, trien tinh
khien tinh » khien thich, bien tinh, dien tinh
nhung cong » dung cong, thong cong, hang cong
thanh chau » thanh cha, thanh cham, thanh chu
tranh va » tranh van, trang va, trinh va
cong van » cong vang, cong san, song 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 tinh) OR (khien tinh)) - canh tranh va nhung cong van ((thanh chau) or (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien tinh) OR (khien tinh)) - canh tranh va nhung cong van ((thanh chau) OR (phan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien tinh) OR (khien tinh)) - canh tranh va nhung cong van ((thanh chau) or (phan cau))".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien tinh) OR (khien tinh)) - canh tranh va nhung cong van ((thanh chau) or (phan cau))*.