Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
chieu sach » chinh sach, chiet tach, chieu sang
thieu cac » thien cac, hieu ca, chieu cao
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
hieu cac » hieu luc, hieu va, hieu van
cong tan » cong tac, cong san, cong thanh
tan chan » dan chan, ban chan, can chan
chan cau » phan cau, can cau, chinh cau

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

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