Perhaps you should try some spelling variations:
thanh trung » thanh tung
hoc thiet » hoc thieu, hoc thuyet, hoc hien
thiet anh » thien anh, thuyet anh, thien danh
trung can » trung cap, trung van, trong can
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
toan cau » toan cao, toan tap, toan tai
toan ban » van ban
can ban » van 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 thiet anh - thanh trung can ban ((cong dan) or (cong tan)) ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet anh - thanh trung can ban ((cong dan) OR (cong tan)) ((toan cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc thiet anh - thanh trung can ban ((cong dan) or (cong tan)) ((toan cau) or (toan ban))*.