Perhaps you should try some spelling variations:
thien van » thi van
nham thuc » nhan thuc, nam thuc, nham thu
toc sach » hoc sach, doc sach, thuoc sach
dinh dai » dinh dat, sinh dai, dinh dao
cau tren » cu tren, dau tren, ca tren
van nham » van nam, van nhan, van tham
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
va dinh » van dinh, va kinh, va tinh
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cua triet, dua tren
cuu tre » cau treo
thuc va » thuc vat, thuc dan, thuc day

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ty nang xa hoi. thien van nham thuc va dinh dai ((cua tre) or (((cuu tre) or (cau tren))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty nang xa hoi. thien van nham thuc va dinh dai ((cua tre) OR (((cuu tre) OR (cau tren)))).
• Adding a wildcard symbol may retrieve word variants: toc sach ty nang xa hoi. thien van nham thuc va dinh dai ((cua tre) or (((cuu tre) or (cau tren))))*.