Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung tuan » trung thanh, trung tam, tran tuan
trong tang » trong trang, trong tan, trong dang
thuc xanh » thuc hanh, thuc thanh, thuc dan
tuan dung » tuan duong, tran dung, tan dung
hoc thuc » hoc huu
tang van » dang van, hoang van, trong van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thuc xanh - thanh trung tuan dung trong tang van ban~.
• Adding a wildcard symbol may retrieve word variants: hoc thuc xanh - thanh trung tuan dung trong tang van ban*.