Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu xanh, hieu cach
chieu sang » chieu xanh, hieu lang, nhieu tang
nhung cong » dung cong, thong cong, hang cong
canh manh » lanh manh, canh tranh, cach mang
cong tinh » cong trinh, cong vinh, long tinh
toan ban » van ban
manh va » hanh va, anh va, minh va

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 (chieu sang)) - canh manh va nhung cong tinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((chieu sach) OR (chiet tach))) OR (chieu sang)) - canh manh va nhung cong tinh toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((((chieu sach) or (chiet tach))) or (chieu sang)) - canh manh va nhung cong tinh toan ban*.