Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
hien nhanh » hien hanh, tien thanh, dien thanh
hanh trinh » canh tranh, hanh chinh
trinh cua » tinh cua, trinh luat, trinh quan
dong dan » dong danh, duong dan, dong san
than tap » han tap, phan tap, than cap
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: hoc ((thien thanh) or (hien nhanh)) - hanh trinh cua cong dong dan ((than tap) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien thanh) OR (hien nhanh)) - hanh trinh cua cong dong dan ((than tap) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc ((thien thanh) or (hien nhanh)) - hanh trinh cua cong dong dan ((than tap) or (toan tap))*.