Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
thanh tung » thanh cong
tuan thong » toan thong, tran thong, tuan phong
thong dung » thong cong, thong thuong
dung thanh » duong thanh, dong thanh, dang thanh
trong mach » trong cac, trong minh, trong anh
hieu lang » chieu sang, nhieu tang, hieu van
tung tuan » trung tuan, hung tuan, quang tuan
trong bau » trong ban, trong ba, trong dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: nho ((hieu lang) OR (hieu quang)) - thanh tung tuan thong dung thanh ((trong mach) or (trong bau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nho ((hieu lang) OR (hieu quang)) - thanh tung tuan thong dung thanh ((trong mach) OR (trong bau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "nho ((hieu lang) OR (hieu quang)) - thanh tung tuan thong dung thanh ((trong mach) or (trong bau))".
• Adding a wildcard symbol may retrieve word variants: nho ((hieu lang) OR (hieu quang)) - thanh tung tuan thong dung thanh ((trong mach) or (trong bau))*.