Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
nhu phuong » thu phuong, nhung phuong, thi phuong
hieu lang » chieu sang, hieu quang, nhieu tang
hanh tang » hanh trang, anh tang, hanh mang
hieu van » hieu va, thien van, lieu va
tang cua » mang cua, hang cua, tang luan
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: ho ((hieu van) or (hieu lang)) - hanh tang cua ((nhung cong) or (nhu phuong)) tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu van) OR (hieu lang)) - hanh tang cua ((nhung cong) OR (nhu phuong)) tinh toan cau.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu van) or (hieu lang)) - hanh tang cua ((nhung cong) or (nhu phuong)) tinh toan cau*.