Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hieu cao » chieu cao, hieu ca, kieu cao
hieu cac » hieu luc, hieu va, hieu van
thuc dan » thuc hanh, hoc dan, thuc vat
sach ky » sac ky, sach y, sach ty
thuc va » thuc vat, thuc day
danh di » danh du, xanh di, danh dien
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de cua
x hoi » xa hoi, o hoi, x ho

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 nang x hoi. ((hieu cao) or (hieu cac)) chat ((thuc va) OR (thuc dan)) danh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky nang x hoi. ((hieu cao) OR (hieu cac)) chat ((thuc va) OR (thuc dan)) danh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky nang x hoi. ((hieu cao) or (hieu cac)) chat ((thuc va) OR (thuc dan)) danh di cua tre".
• Adding a wildcard symbol may retrieve word variants: thuat sach ky nang x hoi. ((hieu cao) or (hieu cac)) chat ((thuc va) OR (thuc dan)) danh di cua tre*.