Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cham » va chat, va tham
thuc va » thuc vat, thuc dan, thuc day
hanh di » hanh vi, hang di, danh di
hanh de » hanh ve, hanh kem
cua tre » cua te, cuu tre, cua triet

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 ty nang xa hoi. hieu va cham thuc va ((hanh di) or (hanh de)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang xa hoi. hieu va cham thuc va ((hanh di) OR (hanh de)) cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ty nang xa hoi. hieu va cham thuc va ((hanh di) or (hanh de)) cua tre*.