Perhaps you should try some spelling variations:
toc sach » thuoc sach, nuoc sach, toc san
hoc sach » hoc sinh, hoc cac, hoc anh
doc sach » nuoc sach, dac sac, bo sach
hieu van » hieu va, thien van, lieu va
danh va » doanh va, hanh va, anh va
va danh » va dinh, va dan, va hanh
van cam » van nam, van lam, van cau
nang xa » nang x, lang xa, nang ma
ly nang » ky nang, ly hang, ly vang
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
va cua » va chua, via cua, ca cua

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) OR (hoc sach))) or (doc sach)) ly nang xa hoi. hieu van cam xuc va danh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((toc sach) OR (hoc sach))) OR (doc sach)) ly nang xa hoi. hieu van cam xuc va danh va cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((toc sach) OR (hoc sach))) or (doc sach)) ly nang xa hoi. hieu van cam xuc va danh va cua tre*".