Perhaps you should try some spelling variations:
thien van » thi van
nham thuc » nhan thuc, nam thuc, nham thu
doc sach » hoc sach, toc sach, nuoc sach
van nham » van nam, van nhan, van tham
kinh dat » dinh dat, kinh dao, chinh dat
thuc va » thuc vat, thuc dan, thuc day
va kinh » va tinh, qua kinh
dat cua » dai cua, day cua, mat cua
cua tre » cua te, cuu tre, cua triet
y nang » ly nang, v nang, may nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc sach ((y nang) OR (ky nang)) xa hoi. thien van nham thuc va kinh dat cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc sach ((y nang) OR (ky nang)) xa hoi. thien van nham thuc va kinh dat cua tre".
• Adding a wildcard symbol may retrieve word variants: doc sach ((y nang) OR (ky nang)) xa hoi. thien van nham thuc va kinh dat cua tre*.