Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
hanh vai » hanh vi, hanh va, hanh van
sach ky » sac ky, sach y, sach ty
duc ban » duc tan, duc van, dua ban
tu sach » thu sach, su sach, te sach
va chat » van chat, va phat, cao chat
va cham » va tham
cua su » qua su

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 ky nang x ho. hieu ((va cham) OR (va chat)) duc ban ((hanh vai) or (hanh tai)) cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x ho. hieu ((va cham) OR (va chat)) duc ban ((hanh vai) OR (hanh tai)) cua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x ho. hieu ((va cham) OR (va chat)) duc ban ((hanh vai) or (hanh tai)) cua su".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x ho. hieu ((va cham) OR (va chat)) duc ban ((hanh vai) or (hanh tai)) cua su*.