Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu sang » chieu sang, thieu khang, thieu quang
chieu sach » chinh sach, chiet tach, chieu sang
trung tuan » trung thanh, trung tam, tran tuan
tuan thong » toan thong, tran thong, tuan phong
thong van » trong van, thong va, thong quan
van chan » van chat, dan chan, van phan
chan cac » phan cac, chon cac, nhan cach

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu sang) or (chieu sach)) - thanh trung tuan thong thong van chan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (chieu sach)) - thanh trung tuan thong thong van chan cac.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) or (chieu sach)) - thanh trung tuan thong thong van chan cac*.