Perhaps you should try some spelling variations:
thanh trung » thanh tung
phai nhuong » phan thuong, pham thuong, pham chuong
tien manh » tien thanh, tieng anh, tran manh
tien anh » tieng anh, dien anh, tien thanh
ha nhung » hoa nhung, hay nhung, pha nhung
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
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 ((tien anh) OR (tien manh)) - thanh trung ((ha nhung) or (phai nhuong)) cong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((tien anh) OR (tien manh)) - thanh trung ((ha nhung) OR (phai nhuong)) cong tan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((tien anh) OR (tien manh)) - thanh trung ((ha nhung) or (phai nhuong)) cong tan toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((tien anh) OR (tien manh)) - thanh trung ((ha nhung) or (phai nhuong)) cong tan toan cao*.