Perhaps you should try some spelling variations:
nang tai » hang tai, tang tai, sang tai
hanh vai » hanh vi, hanh tai, hanh van
mang lai » mang lam, mang luoi, dang loai
su sach » so sach, vu sach
cam duc » cam xuc, cao duc, pham duc
hanh va » hang va, hanh vi
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam

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 ky ((nang tai) or (mang lai)) hoi. hieu ve cam duc va ((hanh vai) or (hanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang tai) OR (mang lai)) hoi. hieu ve cam duc va ((hanh vai) OR (hanh va)) cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang tai) or (mang lai)) hoi. hieu ve cam duc va ((hanh vai) or (hanh va)) cua tre*.