Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sach, chieu sang, hieu manh
chieu tinh » trieu tinh, chau tinh, kieu tinh
lieu tinh » trieu tinh, diep tinh, bien tinh
trung cua » truong cua, trung tuan, trung cap
trong bai » trong ban, thong bai, trong hai
cua dung » cua dang, cua dong, qua dung
bai toan » bai tap
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: hoc ((chieu xanh) or (((chieu tinh) or (lieu tinh)))) - thanh trung cua dung trong bai toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (((chieu tinh) OR (lieu tinh)))) - thanh trung cua dung trong bai toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (((chieu tinh) or (lieu tinh)))) - thanh trung cua dung trong bai toan ban*.