Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
tranh cua » doanh cua, manh cua
hang cong » dang cong, hang nong, bang cong
cong tinh » cong trinh, cong vinh, long tinh
hieu cac » hieu luc, hieu va, hieu van
cua hang » cua dang, cua nhung, cua cong
toan cao » toan ban, toan tap

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

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