Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
manh toan » thanh toan, anh tuan, tinh toan
dan than » dan chan, ban than, van than
ho hieu » ho chieu, hoi hieu, nho hieu
nan cua » nhan cua, ban cua, nam cua
dan cua » dan ca, ban cua, dai cua

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 - canh ((nan cua) or (dan cua)) thong cong ((dan than) or (manh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - canh ((nan cua) OR (dan cua)) thong cong ((dan than) OR (manh toan)) cau.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - canh ((nan cua) or (dan cua)) thong cong ((dan than) or (manh toan)) cau*.