Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
thien van » thi van
toc sach » hoc sach, doc sach, thuoc sach
cham tuc » pham thuc, tham thuc, cham soc
day cua » dai cua
va tinh » may tinh
va dinh » van dinh, va kinh, vu dinh
cua tre » cua te, cuu tre, cua triet
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang

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 ((cham tuc) OR (nham thuc)) ((va dinh) or (va tinh)) day cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty nang xa hoi. thien van ((cham tuc) OR (nham thuc)) ((va dinh) OR (va tinh)) day cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty nang xa hoi. thien van ((cham tuc) OR (nham thuc)) ((va dinh) or (va tinh)) day cua tre".
• Adding a wildcard symbol may retrieve word variants: toc sach ty nang xa hoi. thien van ((cham tuc) OR (nham thuc)) ((va dinh) or (va tinh)) day cua tre*.