Perhaps you should try some spelling variations:
dong thong » thong thong, nong thon, dong thanh
hien hanh » dieu hanh
hanh mang » nhanh mang, hanh trang, nhanh lang
thong han » thuong han, thong phan, thong nhan
anh tang » anh bang, anh dang, anh nang
cua dong » chua dong, cua cong, cua dang
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

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 hanh - ((hanh mang) or (anh tang)) cua dong thong han ((toan cau) OR (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hanh - ((hanh mang) OR (anh tang)) cua dong thong han ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien hanh - ((hanh mang) or (anh tang)) cua dong thong han ((toan cau) OR (toan cao))".
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - ((hanh mang) or (anh tang)) cua dong thong han ((toan cau) OR (toan cao))*.