Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh tai, hanh van
lang man » lang van, lang ban, lang mai
tu sach » thu sach, te sach, tu cach
hanh va » hang va, hanh vi
va pham » van pham, va phat, va phap
hieu va » lieu va, hieu qua
man hoi » man hoai, dan hoi, van hoi
ky lang » ky nang, ky dang, ky tang
su sach » so sach, vu sach
cuu tre » cua tre, cau tren, cau treo

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 (su sach)) ky lang man hoi. hieu va pham duc va ((hanh vai) or (hanh va)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky lang man hoi. hieu va pham duc va ((hanh vai) OR (hanh va)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ky lang man hoi. hieu va pham duc va ((hanh vai) or (hanh va)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ky lang man hoi. hieu va pham duc va ((hanh vai) or (hanh va)) cuu tre*.