Perhaps you should try some spelling variations:
trinh quan » tinh quang, trinh luat, trinh han
thong cong » trong cong, tong cong, thong thong
trinh cua » trinh luat, trinh luan, trinh chat
tinh cua » sinh cua, tinh chat, tranh cua
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu qua - thanh ((tinh cua) or (((trinh cua) OR (trinh quan)))) thong cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu qua - thanh ((tinh cua) OR (((trinh cua) OR (trinh quan)))) thong cong dan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu qua - thanh ((tinh cua) or (((trinh cua) OR (trinh quan)))) thong cong dan toan cau".
• Adding a wildcard symbol may retrieve word variants: ho hieu qua - thanh ((tinh cua) or (((trinh cua) OR (trinh quan)))) thong cong dan toan cau*.