Perhaps you should try some spelling variations:
thuong thong » thong thong, thuong trong, thuong phuong
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
thong van » trong van, thong va, thong quan
ho chieu » theo chieu, hoc thieu, doi chieu
trung va » truong va, trang va, trung ha
toan tai » toan tap, doanh tai, toan cao
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sang - thanh trung va thuong thong van ((toan tai) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - thanh trung va thuong thong van ((toan tai) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - thanh trung va thuong thong van ((toan tai) or (toan ban))*.