Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
than sinh » than kinh, nhan sinh, thai sinh
sinh thuc » trinh thuc, sinh hoc, sinh thai
thuc dung » thuoc dung, thuy dung, tuc dung
dung cong » dung trong
cong lang » cong vang, cong luong, cong quang
lang toan » dang toan, lang thang, lang thanh
toan cau » 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 nhanh) or (hieu manh)) - than sinh thuc dung cong lang toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien nhanh) OR (hieu manh)) - than sinh thuc dung cong lang toan cau*.