Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
lang khoa » hang khoa, dang khoa, long khoa
khoa hoi » khoan hoi, khoa hoc, khoa doi
thanh vi » hanh vi, thanh va, thanh ve
toc sac » toc sach, hoc sach, doc sach
ky lang » ky nang, ky dang, ky tang
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
duc ban » duc tan, duc van, dua ban
cua te » cua tu
ve cam » ve cham, ve cac, va cam
cua su » qua su

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sac) OR (toc san)) ky lang khoa hoi. hieu ve cam duc ban thanh vi ((cua te) or (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sac) OR (toc san)) ky lang khoa hoi. hieu ve cam duc ban thanh vi ((cua te) OR (cua su))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sac) OR (toc san)) ky lang khoa hoi. hieu ve cam duc ban thanh vi ((cua te) or (cua su))*".