Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
hanh trung » thanh trung, hanh trang, manh trung
hieu manh » chieu xanh, hieu nganh, dieu hanh
trung cua » truong cua, trung tuan, trung cap
cong hang » cong thang, cong hung, cong lang
toan ban » van ban
va toan » van toan, bai toan, tap toan

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