Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thien hach » thien thanh, hien hanh
nhung cong » dung cong, thong cong, hang cong
tranh cua » doanh cua
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
manh cua » doanh cua, ban cua
toan tap » toan ban

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