Perhaps you should try some spelling variations:
nhieu tang » hieu lang, nhiet nang
chieu sang » chieu sach, chieu xanh, hieu lang
hanh trong » hanh trang, anh trong, hinh trong
thong than » thong thanh, thong phan, thong nhan
trong cap » trung cap, trong cac, trong ca
cap thong » cap tong, chap thuong, phap thong
thong tan » thong tran, thong tin, thong van
ran cau » van cau, ban cau, can cau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((nhieu tang) or (chieu sang)) - hanh trong cap thong ((thong tan) OR (thong than)) ran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((nhieu tang) OR (chieu sang)) - hanh trong cap thong ((thong tan) OR (thong than)) ran cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((nhieu tang) or (chieu sang)) - hanh trong cap thong ((thong tan) OR (thong than)) ran cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((nhieu tang) or (chieu sang)) - hanh trong cap thong ((thong tan) OR (thong than)) ran cau*.