Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
doi chieu » doc hieu, doi chi, mot chieu
cdinh cua » chinh cua, dinh cuu, sinh cua
ho chieu » theo chieu, hoc thieu, mot chieu
dinh cua » dinh cuu, sinh cua, dinh cu
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (doi chieu)) xanh - hanh ((cdinh cua) or (dinh cua)) thong cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) xanh - hanh ((cdinh cua) OR (dinh cua)) thong cong dan toan cau.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) xanh - hanh ((cdinh cua) or (dinh cua)) thong cong dan toan cau*.