Perhaps you should try some spelling variations:
cham tuc » nham thuc, pham thuc, tham thuc
hanh tai » thanh tai, hang tai, han tai
hanh vai » hanh vi, hanh va, hanh van
nang cau » nang cao, hang cau, nang dau
sach ky » sac ky, sach ty, sach kem
va cham » va chat, va tham
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, tuc xa

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