Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
nhung cong » dung cong, thong cong, nhung don
hanh hinh » hanh chinh, hanh tinh, hanh dinh
hang cong » dang cong, hang nong, bang cong
hinh cua » chinh cua, sinh cua, tinh cua
gian man » gian dan, gian lan, gian van

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 (chieu sang)) - hanh hinh cua ((nhung cong) OR (hang cong)) dan gian man~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (chieu sang)) - hanh hinh cua ((nhung cong) OR (hang cong)) dan gian man.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sach) or (chieu sang)) - hanh hinh cua ((nhung cong) OR (hang cong)) dan gian man".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (chieu sang)) - hanh hinh cua ((nhung cong) OR (hang cong)) dan gian man*.