Perhaps you should try some spelling variations:
thien van » thi van
dan thanh » dang thanh, danh thanh, ban thanh
thanh vi » hanh vi, thanh va, thanh ve
toc sach » hoc sach, doc sach, thuoc sach
nam qua » nam quan, nam cua, nam xua
nam mua » nam cua, nam xua, nam luat
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (toc sach)) ty nang xa hoi. thien van ((nam mua) OR (nam qua)) dan thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ty nang xa hoi. thien van ((nam mua) OR (nam qua)) dan thanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (toc sach)) ty nang xa hoi. thien van ((nam mua) OR (nam qua)) dan thanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) ty nang xa hoi. thien van ((nam mua) OR (nam qua)) dan thanh vi cua tre*.