Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hieu manh » chieu xanh, hieu nganh, dieu hanh
hang nang » chang nang, hang hang, thong nang
hang nong » thang long, han tong
cao hang » cao dang, cao tang, cao bang
nong tap » tong tap, nong tan, nhung tap
tap toan » tap doan, tap quan, bai toan
toan ban » van 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 sang) or (hieu manh)) - hang nang cao hang nong tap toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (hieu manh)) - hang nang cao hang nong tap toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (hieu manh)) - hang nang cao hang nong tap toan ban*.