Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
tien kinh » trien kinh, dien kinh, tien minh
trinh cua » tinh cua, trinh luat, trinh quan
dong cong » duong cong, dung cong, cong cong
dang cong » dung cong
hoc tien » hoc tieng, hoc hien, hoc vien
toan tap » toan ban
toan cao » 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: hoc tien kinh - hanh trinh cua ((dong cong) OR (dang cong)) dan ((toan tap) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc tien kinh - hanh trinh cua ((dong cong) OR (dang cong)) dan ((toan tap) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc tien kinh - hanh trinh cua ((dong cong) OR (dang cong)) dan ((toan tap) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: hoc tien kinh - hanh trinh cua ((dong cong) OR (dang cong)) dan ((toan tap) or (toan cao))*.