Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
chieu xanh » chieu sach, chieu sang, chieu tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
cuong tap » luong tap, cong tac, luong tai
dung cua » dung luan, dung cho
cong tap » cong tac, cong tan, tong tap
toan ban » van ban

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - hanh ((dung cua) OR (trung tuan)) thong ((cong tap) OR (cuong tap)) toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu xanh - hanh ((dung cua) or (trung tuan)) thong ((cong tap) OR (cuong tap)) toan ban~".
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - hanh ((dung cua) or (trung tuan)) thong ((cong tap) OR (cuong tap)) toan ban*.