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