Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
thanh vi » hanh vi, thanh va, thanh ve
lang hoa » hang hoa, lang ha, nang hoa
toc sac » toc sach, hoc sach, doc sach
duc ban » duc tan, duc van, dua ban
cam duc » cam xuc, cao duc, pham duc
van cam » van nam, van lam, van cau
hoa hoi » khoa hoi, hoa hoc, hoa doi
ky lang » ky nang, ky dang, ky tang
cua te » cua tu

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