Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu manh » hieu nganh, dieu hanh, hien hanh
trung cua » truong cua, trung tuan, trung cap
dang cong » dung cong
tang cua » mang cua, hang cua, tang luan
cong van » cong vang, cong san, song van
ban can » ban dan, ban hang, ban hanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu manh) or (chieu xanh)) - hanh ((tang cua) or (trung cua)) dang cong van ban can~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (chieu xanh)) - hanh ((tang cua) OR (trung cua)) dang cong van ban can.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (chieu xanh)) - hanh ((tang cua) or (trung cua)) dang cong van ban can*.