Perhaps you should try some spelling variations:
trinh quan » tinh quang, trinh luat, trinh han
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
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 than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap
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 lang - hanh ((((trinh cua) OR (trinh quan))) or (tinh cua)) nhung cong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh ((((trinh cua) OR (trinh quan))) OR (tinh cua)) nhung cong dan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - hanh ((((trinh cua) OR (trinh quan))) or (tinh cua)) nhung cong dan than cau".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh ((((trinh cua) OR (trinh quan))) or (tinh cua)) nhung cong dan than cau*.