Perhaps you should try some spelling variations:
bach duoc » bach tuoc, sach duoc, ban duoc
thu sach » thuat sach, thuoc sach, thu hoach
hanh tai » thanh tai, hang tai, han tai
hanh lai » hanh lam, thanh lap, thanh loi
duoc va » nuoc va, duc va, duoc ma
tu sach » su sach, te sach, tu cach
ve bach » ve cach, vu bach, vi bach
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (thu sach)) ky nang x ho. hieu ve bach duoc va ((hanh lai) or (hanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang x ho. hieu ve bach duoc va ((hanh lai) OR (hanh tai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ky nang x ho. hieu ve bach duoc va ((hanh lai) or (hanh tai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ky nang x ho. hieu ve bach duoc va ((hanh lai) or (hanh tai)) cua tre*.