Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
nguong dan » huong dan
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh tang » hanh trang, anh tang, hanh mang
cua nhung » va nhung
tang cua » mang cua, hang cua, tang luan
nong dan » cong dan, nong san, huong dan
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 ((hieu manh) or (chieu sang)) - hanh tang cua nhung ((nong dan) OR (nguong dan)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (chieu sang)) - hanh tang cua nhung ((nong dan) OR (nguong dan)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (chieu sang)) - hanh tang cua nhung ((nong dan) OR (nguong dan)) toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (chieu sang)) - hanh tang cua nhung ((nong dan) OR (nguong dan)) toan cao*.