Perhaps you should try some spelling variations:
qua cham » qua hai, va cham, qua cua
va thanh » gia thanh, ban thanh, va tinh
thanh va » thanh van, hanh va, thanh ha
su sach » so sach, vu sach
ly nang » ky nang, ly hang, ly vang
qua cac » cua cac
va chua » vua chua, ca chua, va chu
chua te » cua te, chua tu, chua xe
y nang » ky nang, v nang, may nang

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 (ly nang)) xa hoi. hieu ((qua cham) OR (qua cac)) duc va thanh va chua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (ly nang)) xa hoi. hieu ((qua cham) OR (qua cac)) duc va thanh va chua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) or (ly nang)) xa hoi. hieu ((qua cham) OR (qua cac)) duc va thanh va chua te".
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) or (ly nang)) xa hoi. hieu ((qua cham) OR (qua cac)) duc va thanh va chua te*.