Perhaps you should try some spelling variations:
nhieu tang » hieu lang, nhiet nang
chieu sang » chieu sach, chieu xanh, hieu lang
hanh trung » thanh trung, hanh trang, manh trung
trung cap » truong cao, trung tam
cap thong » cap tong, chap thuong, phap thong
thong tan » thong than, thong tran, thong van
toan cau » 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 ((nhieu tang) or (chieu sang)) - hanh trung cap thong ((thong tan) OR (thong tin)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((nhieu tang) OR (chieu sang)) - hanh trung cap thong ((thong tan) OR (thong tin)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((nhieu tang) or (chieu sang)) - hanh trung cap thong ((thong tan) OR (thong tin)) toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((nhieu tang) or (chieu sang)) - hanh trung cap thong ((thong tan) OR (thong tin)) toan cau*.