Perhaps you should try some spelling variations:
thue nang » thien nang, thuat nang, thi nang
toc sach » hoc sach, thuoc sach, nuoc sach
doc sach » hoc sach, nuoc sach, dac sac
va hanh » van hanh, va thanh, ban hanh
vai cua » dai cua, hai cua, lai cua
va danh » va dinh, va dan, dia danh
cua tre » cua te, cuu tre, cua triet
cam luc » cam xuc, cau luc
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
va cam » va cham, va cac, va cao

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