Perhaps you should try some spelling variations:
su sach » so sach, vu sach
cac tuc » cac toc, cac tu, cac tac
dinh ve » dinh ket, dinh van
dinh de » dinh du, dinh le, sinh de
kv nang » ky nang, ki nang, ke nang
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
tuc va » thuc va, truc va, tuc xa
v nang » va nang, vu nang, van nang
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: su sach ((v nang) or (kv nang)) xa hoi. hieu ve cac tuc va ((dinh de) or (dinh ve)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((v nang) OR (kv nang)) xa hoi. hieu ve cac tuc va ((dinh de) OR (dinh ve)) cua te.
• Adding a wildcard symbol may retrieve word variants: su sach ((v nang) or (kv nang)) xa hoi. hieu ve cac tuc va ((dinh de) or (dinh ve)) cua te*.