Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
hieu cao » chieu cao, hieu cac, kieu cao
danh dai » danh dau, danh sai, vanh dai
truc va » thuc va, thuc vat, trung va
danh di » danh du, xanh di, danh dien
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
hieu ca » hieu cac, hieu cua, hieu va
nang xa » nang x, lang xa, nang ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ky nang xa hoi. ((hieu cao) or (hieu ca)) cau truc va ((danh dai) OR (danh di)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky nang xa hoi. ((hieu cao) OR (hieu ca)) cau truc va ((danh dai) OR (danh di)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ky nang xa hoi. ((hieu cao) or (hieu ca)) cau truc va ((danh dai) OR (danh di)) cua tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky nang xa hoi. ((hieu cao) or (hieu ca)) cau truc va ((danh dai) OR (danh di)) cua tre*.