Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua
hoi hieu » hoi phieu, hoi tieu, moi hieu
manh cua » doanh cua, ban cua
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van phan
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoi hieu lang - canh ((tranh cua) or (manh cua)) thong cong dan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi hieu lang - canh ((tranh cua) OR (manh cua)) thong cong dan phan cau.
• Adding a wildcard symbol may retrieve word variants: hoi hieu lang - canh ((tranh cua) or (manh cua)) thong cong dan phan cau*.