Perhaps you should try some spelling variations:
thanh tung » thanh cong
hoc hieu » hoc thieu, hoc hien, hoc dieu
doc hieu » toc thieu, hoc thieu, hoc hien
ca nhung » cua nhung, cam nhung, va nhung
cong tac » cong ty
phan cau » phan dau, phan cac, phan tu
tung ca » trung ca, tang ca, cung ca

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 (doc hieu)) cach - thanh tung ca nhung ((cong san) or (cong tac)) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hieu) OR (doc hieu)) cach - thanh tung ca nhung ((cong san) OR (cong tac)) phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hieu) OR (doc hieu)) cach - thanh tung ca nhung ((cong san) or (cong tac)) phan cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) OR (doc hieu)) cach - thanh tung ca nhung ((cong san) or (cong tac)) phan cau*.