Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
lieu tinh » trieu tinh, diep tinh, bien tinh
cong minh » cong tinh, song minh, cong binh
cong vinh » cong trinh, trong vinh, cong viec
tong minh » thong minh, trong minh, song minh
trinh va » trinh van, trinh vat, trinh ve
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: du lieu tinh - hanh trinh va nhung ((((cong minh) or (cong vinh))) or (tong minh)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: du lieu tinh - hanh trinh va nhung ((((cong minh) OR (cong vinh))) OR (tong minh)) toan tap.
• Adding a wildcard symbol may retrieve word variants: du lieu tinh - hanh trinh va nhung ((((cong minh) or (cong vinh))) or (tong minh)) toan tap*.