Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
thanh han » thanh phan, thanh nhan, thanh hang
hoc hieu » hoc hien, doc hieu, hoc dieu
hanh han » hanh nhan, hanh phan, hanh san
cong san » cong tac
san toan » van toan, dan toan, manh 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 hieu) OR (hoc thieu)) cach - ((hanh han) or (thanh han)) va nhung cong san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hieu) OR (hoc thieu)) cach - ((hanh han) OR (thanh han)) va nhung cong san toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hieu) OR (hoc thieu)) cach - ((hanh han) or (thanh han)) va nhung cong san toan cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) OR (hoc thieu)) cach - ((hanh han) or (thanh han)) va nhung cong san toan cau*.