Perhaps you should try some spelling variations:
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, va danh
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
tuc va » thuc va, truc va, tuc xa
cua te » cua tu
cua su » qua su
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang x hoi. hieu ((ve cam) OR (ve cac)) tuc va hanh vi ((cua te) or (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x hoi. hieu ((ve cam) OR (ve cac)) tuc va hanh vi ((cua te) OR (cua su)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang x hoi. hieu ((ve cam) OR (ve cac)) tuc va hanh vi ((cua te) or (cua su))".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. hieu ((ve cam) OR (ve cac)) tuc va hanh vi ((cua te) or (cua su))*.