Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu manh » chieu xanh, hieu nganh, dieu hanh
hoc hieu » hoc thieu, hoc hien, doc hieu
kha nang » phap nang, ky nang, ki nang
huy toan » huy tran, huu toan, huy hoang
ha nang » hoa nang, da nang, ha tang
ty toan » ly toan, tap toan, tam toan

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - thanh trung ((ha nang) OR (kha nang)) cong ((ty toan) OR (huy toan)) tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - thanh trung ((ha nang) or (kha nang)) cong ((ty toan) OR (huy toan)) tap~".
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - thanh trung ((ha nang) or (kha nang)) cong ((ty toan) OR (huy toan)) tap*.