Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu xanh » chieu sang, chieu tinh, hieu manh
nguong van » nguong va, duong van, truong van
nguong dan » huong dan
tranh ca » tranh cua, tranh cac, tranh cai
ca tang » cao tang, ha tang, gia tang
tan cau » toan cau, van cau, tan ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sach) or (chieu xanh)) - canh tranh ca tang ((nguong van) OR (nguong dan)) tan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chieu xanh)) - canh tranh ca tang ((nguong van) OR (nguong dan)) tan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sach) or (chieu xanh)) - canh tranh ca tang ((nguong van) OR (nguong dan)) tan cau".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) or (chieu xanh)) - canh tranh ca tang ((nguong van) OR (nguong dan)) tan cau*.