Perhaps you should try some spelling variations:
thien van » thi van
thu sach » tu sach, thuat sach, thuoc sach
can thuc » dan thuc, van thuc, cay thuc
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau tren, cau treo
vi cuu » vi luu, vinh cuu

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 ly nang xa hoi. ((((hieu va) or (thien van))) or (hieu qua)) can thuc va hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ly nang xa hoi. ((((hieu va) OR (thien van))) OR (hieu qua)) can thuc va hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ly nang xa hoi. ((((hieu va) or (thien van))) or (hieu qua)) can thuc va hanh vi cuu tre*.