Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
sach ky » sach y, sach ty, sach kem
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
nang o » nang co, nang ho, nang ro
luc va » duc va, tuc va, loc va
sac ky » cac ky, sai ky
ve cam » ve cham, ve cac, ve cai
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat ((sach ky) OR (sac ky)) nang o hoi. hieu ((ve cam) or (va cam)) luc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat ((sach ky) OR (sac ky)) nang o hoi. hieu ((ve cam) OR (va cam)) luc va hanh vai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat ((sach ky) OR (sac ky)) nang o hoi. hieu ((ve cam) or (va cam)) luc va hanh vai cua tre*".