Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
thong cong » trong cong, thong thong, phong chong
canh manh » lanh manh, canh tranh, cach mang
tong cong » trong cong, cong cong, dung cong
manh cua » doanh cua, ban cua
dan chan » dan gian, dan ca, van chat
chan cau » phan cau, can cau, chinh 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 hien) or (theo chieu)) xanh - canh manh cua ((thong cong) OR (tong cong)) dan chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hien) OR (theo chieu)) xanh - canh manh cua ((thong cong) OR (tong cong)) dan chan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hien) or (theo chieu)) xanh - canh manh cua ((thong cong) OR (tong cong)) dan chan cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc hien) or (theo chieu)) xanh - canh manh cua ((thong cong) OR (tong cong)) dan chan cau*.