Perhaps you should try some spelling variations:
nhanh than » nhanh thanh, nhanh thang, nhanh thai
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
cua thong » cua thuong, cua khong, cua tong
than cua » nhan cua, thai cua, ban cua
cong tac » cong ty
tac ca » tac cua, tac can, tac cay
ca cau » cua cau, cac cau, can cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((hieu lang) or (trieu tinh)) - nhanh than cua thong cong tac ca cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu lang) OR (trieu tinh)) - nhanh than cua thong cong tac ca cau.
• Adding a wildcard symbol may retrieve word variants: doi ((hieu lang) or (trieu tinh)) - nhanh than cua thong cong tac ca cau*.