Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cua triet » cua viet, su triet, va triet
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
cac suc » cao suc, cac nuoc, cac cuoc
ma hoi » mai hoi, xa hoi, me hoi
ve cac » va cac, vien cac
suc va » duc va, tuc va, luc va
va anh » van anh, va danh, va hanh
anh ve » hanh ve, anh va, anh viet
ve cua » le cua, de cua, te cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ky nang ((ma hoi) or (ma hoa)). hieu ve cac suc va anh ve cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky nang ((ma hoi) OR (ma hoa)). hieu ve cac suc va anh ve cua triet*.