Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
thanh ha » thanh hoa, thanh hai, nhanh ha
hieu van » hieu va, thien van, lieu va
thanh vi » hanh vi, thanh va, thanh ve
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
thuc va » thuc vat, thuc day
nang xa » nang x, lang xa, nang ma
van am » van nam, van lam, van dam

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 nang xa hoi. hieu van am ((thuc va) OR (thuc dan)) ((thanh vi) or (thanh ha)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu van am ((thuc va) OR (thuc dan)) ((thanh vi) OR (thanh ha)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu van am ((thuc va) OR (thuc dan)) ((thanh vi) or (thanh ha)) cua tre*".