Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
sach tu » sach thu, cach tu, sach ty
vai cua » dai cua, hai cua, lai cua
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, sang ma, nang cao
va cam » va cham, va cac, va cao
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cham, ve cac, ve cai

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