Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
nhanh lang » nhanh quang, nhanh thang, nhan dang
thong tac » thong cac, tuong tac, thong bac
thong tai » truong tai, thong tin, hang tai
khang cau » hang cau, khang cu, khang chan
va thong » va thuong, va phuong, he thong
lang va » lang van, hang va, lang ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sang) or (trieu tinh)) - nhanh lang va thong ((thong tac) OR (thong tai)) khang cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sang) OR (trieu tinh)) - nhanh lang va thong ((thong tac) OR (thong tai)) khang cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sang) or (trieu tinh)) - nhanh lang va thong ((thong tac) OR (thong tai)) khang cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) or (trieu tinh)) - nhanh lang va thong ((thong tac) OR (thong tai)) khang cau*.