Perhaps you should try some spelling variations:
thanh thong » thanh thuong, thanh hong, thanh thang
thong sang » thong mang, thong nang, thong san
hien tach » thien hach, chiet tach, hien hanh
thong cua » thong quan, thong tu, huong cua
cua thong » cua thuong, cua khong, cua tong
sang thai » sang tai, sang than, dang thai
thai cao » tai cao, thoai cac, thuat cao

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 tach) or (vien bach)) - thanh thong cua thong thong sang thai cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien tach) OR (vien bach)) - thanh thong cua thong thong sang thai cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien tach) or (vien bach)) - thanh thong cua thong thong sang thai cao*.