Perhaps you should try some spelling variations:
thien van » thi van
pham thuc » phap thuc, pham chuc, nham thuc
toc sach » hoc sach, doc sach, thuoc sach
van pham » san pham, van phan, van phat
thuc van » thuc vat, thuc dan, thuc va
van dinh » van minh, van dich, va dinh
dinh dau » dinh dat, dinh du, danh dau
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
cua tre » cuu tre, cua triet, dua tren
cua te » cua tu

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 pham thuc van dinh dau ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty nang xa hoi. thien van pham thuc van dinh dau ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: toc sach ty nang xa hoi. thien van pham thuc van dinh dau ((cua tre) or (cua te))*.