Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hoc thien » hoc hien, hoc thiet, hoc tien
hoc thieu » toc thieu, hoc hien
chinh cau » chinh chau, chinh ca, chinh can
tranh va » tranh van, trang va, trinh va
va thong » va thuong, va phuong, he thong
cong dan » cong san, cong tan, huong dan
chan cau » phan cau, can cau, nhanh cau

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) or (hoc thieu)) anh - canh tranh va thong cong dan ((chan cau) OR (chinh cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thien) OR (hoc thieu)) anh - canh tranh va thong cong dan ((chan cau) OR (chinh cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thien) or (hoc thieu)) anh - canh tranh va thong cong dan ((chan cau) OR (chinh cau))".
• Adding a wildcard symbol may retrieve word variants: ((hoc thien) or (hoc thieu)) anh - canh tranh va thong cong dan ((chan cau) OR (chinh cau))*.