Perhaps you should try some spelling variations:
dien cua » dieu cua, dien cuc, dien cu
sach han » sach tham, sach danh, sach nang
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
va cham » va chat, va tham
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
sach v » sach va, sach y, sach 2

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 v) or (sach han)) nang xa hoi. hieu va cham soc ((va danh) OR (va hanh)) dien cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach v) OR (sach han)) nang xa hoi. hieu va cham soc ((va danh) OR (va hanh)) dien cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach v) or (sach han)) nang xa hoi. hieu va cham soc ((va danh) OR (va hanh)) dien cua tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach v) or (sach han)) nang xa hoi. hieu va cham soc ((va danh) OR (va hanh)) dien cua tre*.