Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sach ky » sac ky, sach y, sach ty
danh di » danh du, xanh di, danh dien
truc va » thuc va, trung va
hieu va » lieu va, hieu qua
hieu ca » hieu cac, hieu cua, hieu xa
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de cua

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

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