Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
tuong cua » truong cua, huong cua, thong cua
trung cua » truong cua, trung tuan, trung cap
cong tan » cong tac, cong san, cong thanh
toan ban » van ban
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 - thanh ((tuong cua) or (trung cua)) thong cong tan ((toan tap) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - thanh ((tuong cua) OR (trung cua)) thong cong tan ((toan tap) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - thanh ((tuong cua) or (trung cua)) thong cong tan ((toan tap) or (toan ban))*.