Perhaps you should try some spelling variations:
nang mai » nang ma, nang tai, lang mai
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hanh ve » hanh vi, hanh va
ve chat » va chat, van chat
ve cham » va cham, vu cham, ve chim
mai hoi » mai khoi, dai hoi, lai hoi
cua tre » cua te, cuu tre, cua triet
soc va » hoc va, loc va, doc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang mai hoi. hieu ((ve cham) or (ve chat)) soc va ((hanh ve) OR (hanh kem)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang mai hoi. hieu ((ve cham) OR (ve chat)) soc va ((hanh ve) OR (hanh kem)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang mai hoi. hieu ((ve cham) or (ve chat)) soc va ((hanh ve) OR (hanh kem)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang mai hoi. hieu ((ve cham) or (ve chat)) soc va ((hanh ve) OR (hanh kem)) cua tre*.