Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thanh trung » thanh tung
hien nhanh » hien hanh, tien thanh, dien thanh
trung cap » truong cao, trung tam
trong thu » trong nha
cap dung » ap dung, cao dung, chan dung
toan cau » toan cao, toan ban, toan tai
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 ((hien nhanh) or (thien thanh)) - thanh trung cap dung trong thu ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien nhanh) OR (thien thanh)) - thanh trung cap dung trong thu ((toan cau) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc ((hien nhanh) or (thien thanh)) - thanh trung cap dung trong thu ((toan cau) or (toan tap))*.