Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
thi nang » thi cong, ki nang, thi hanh
toc sach » hoc sach, doc sach, thuoc sach
dinh dai » dinh dat, sinh dai, dinh dao
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
thi van » thi lan, thi hanh
va dinh » van dinh, va kinh, va tinh
cua tre » cua te, cuu tre, cua triet

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