Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
toc sac » toc sach, toc san, hoc sach
dua ban » dia ban, cua ban, qua ban
duc ban » duc tan, duc van, duc man
lang ha » long ha
hieu ve » hieu va, hieu van
ky lang » ky nang, ky dang, ky tang
ve cam » ve cham, ve cac, va cam
sac ky » cac ky, sai ky
ha hoi » hoa hoi, ha noi, xa hoi
cua te » cua tu
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 ky lang ha hoi. hieu ve cam ((duc ban) OR (dua ban)) thanh vi ((cua te) or (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sac ky lang ha hoi. hieu ve cam ((duc ban) OR (dua ban)) thanh vi ((cua te) OR (cua su)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sac ky lang ha hoi. hieu ve cam ((duc ban) OR (dua ban)) thanh vi ((cua te) or (cua su))".
• Adding a wildcard symbol may retrieve word variants: toc sac ky lang ha hoi. hieu ve cam ((duc ban) OR (dua ban)) thanh vi ((cua te) or (cua su))*.