Perhaps you should try some spelling variations:
thieu nien » thien nhien
nien cac » vien cac, dien cac, bien cac
su sach » so sach, vu sach
va hanh » van hanh, va thanh, va danh
van anh » van thanh, tuan anh, van minh
vai cua » dai cua, hai cua, lai cua
y nang » ly nang, v nang, may nang
cac lo » cac lop, cac co, cac bo
cua tu » cua tuc, cua su, cua cu

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 ((y nang) or (ky nang)) xa hoi. thieu nien cac lo ((va hanh) or (van anh)) vai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (ky nang)) xa hoi. thieu nien cac lo ((va hanh) OR (van anh)) vai cua tu.
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) or (ky nang)) xa hoi. thieu nien cac lo ((va hanh) or (van anh)) vai cua tu*.