Perhaps you should try some spelling variations:
thieu sach » thien hach, hieu cach, theo sach
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong van » cong vang, cong san, song van
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((thieu sach) OR (chieu sach)) - canh tranh cua nhung cong van ((phan lap) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((thieu sach) OR (chieu sach)) - canh tranh cua nhung cong van ((phan lap) OR (phan dau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((thieu sach) OR (chieu sach)) - canh tranh cua nhung cong van ((phan lap) or (phan dau))".
• Adding a wildcard symbol may retrieve word variants: toc ((thieu sach) OR (chieu sach)) - canh tranh cua nhung cong van ((phan lap) or (phan dau))*.