Perhaps you should try some spelling variations:
sach thue » sach thieu, sach tham, cach thuc
sach thu » sach thieu, sach tham, cach thuc
van hanh » van thanh, ban hanh, van anh
chu tre » chu tri, cuu tre, cau tren
hanh va » hang va, hanh vi
duc van » duc va, duc tan, duc manh
cam duc » cam xuc, cao duc, pham duc
nang xa » nang x, lang xa, nang ma
cho tre » cho thue, khoe tre
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: thu ((sach thue) or (sach thu)) nang xa hoi. lieu va cam duc van hanh va ((chu tre) OR (cho tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach thue) OR (sach thu)) nang xa hoi. lieu va cam duc van hanh va ((chu tre) OR (cho tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach thue) or (sach thu)) nang xa hoi. lieu va cam duc van hanh va ((chu tre) OR (cho tre))".
• Adding a wildcard symbol may retrieve word variants: thu ((sach thue) or (sach thu)) nang xa hoi. lieu va cam duc van hanh va ((chu tre) OR (cho tre))*.