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