Perhaps you should try some spelling variations:
tthanh song » thanh cong, thanh long, nhanh song
hien xanh » hien nhanh, chieu xanh, hien khanh
hien hanh » dieu hanh
thanh son » thanh san, thanh cong, thanh toan
cua thong » cua thuong, cua khong, cua tong
thong dan » thong van, tuong dan, thong den
dan toan » van toan, dan than, manh toan
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 xanh) or (hien hanh)) - ((tthanh song) or (thanh son)) cua thong thong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien hanh)) - ((tthanh song) OR (thanh son)) cua thong thong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (hien hanh)) - ((tthanh song) or (thanh son)) cua thong thong dan toan cao*.