Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
lanh manh » lanh tranh, lan anh, van manh
cua thong » cua thuong, cua khong, cua tong
cong vang » cong lang, cong quang, cong ngang
manh cua » doanh cua, ban cua
phan cau » phan cac, phan tu, phan lap
phan dau » phan tu
hang dau » hang va, hang tai
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 - lanh manh cua thong cong vang ((phan cau) or (((phan dau) OR (hang dau))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - lanh manh cua thong cong vang ((phan cau) OR (((phan dau) OR (hang dau)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - lanh manh cua thong cong vang ((phan cau) or (((phan dau) OR (hang dau))))".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - lanh manh cua thong cong vang ((phan cau) or (((phan dau) OR (hang dau))))*.