Perhaps you should try some spelling variations:
dung cong » dung trong
tien manh » tien anh, tien thanh, tieng anh
hoc tien » hoc tieng, hoc hien, hoc vien
nang cua » hang cua, nang dua, tang cua
mang cua » manh cua, dung cua, ban cua
cong tan » cong tac, cong san, cong thanh
toan cau » toan cao, toan tap, toan tai
toan 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 tien manh - anh ((nang cua) or (mang cua)) dung cong tan ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc tien manh - anh ((nang cua) OR (mang cua)) dung cong tan ((toan cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc tien manh - anh ((nang cua) or (mang cua)) dung cong tan ((toan cau) or (toan ban))*.