Perhaps you should try some spelling variations:
hanh truong » hanh trong, anh truong, manh truong
chiet tach » chieu sach
nhieu tang » chieu sang, hieu lang, nhiet nang
nhung cong » dung cong, thong cong, hang cong
truong va » truong dai, truong cao, truong dao
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
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 ((chiet tach) or (nhieu tang)) - hanh truong va nhung cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chiet tach) OR (nhieu tang)) - hanh truong va nhung cong tan toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((chiet tach) or (nhieu tang)) - hanh truong va nhung cong tan toan cau*.