Perhaps you should try some spelling variations:
thanh hang » thanh hoang, thanh thang, tranh hang
tan thanh » tran thanh, tang thanh, toan thanh
thu sach » tu sach, thuat sach, thuoc sach
hang cua » mang cua, hang ca, huong cua
hieu van » hieu va, thien van, lieu va
cao duc » dao duc, cao suc, giao duc
ty nang » ky nang, ty hang, ly nang
hieu ve » hieu va
cua te » cua tu

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 ((ty nang) or (ty xang)) xa hoi. ((hieu ve) OR (hieu van)) cao duc tan thanh hang cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ty nang) OR (ty xang)) xa hoi. ((hieu ve) OR (hieu van)) cao duc tan thanh hang cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((ty nang) or (ty xang)) xa hoi. ((hieu ve) OR (hieu van)) cao duc tan thanh hang cua te".
• Adding a wildcard symbol may retrieve word variants: thu sach ((ty nang) or (ty xang)) xa hoi. ((hieu ve) OR (hieu van)) cao duc tan thanh hang cua te*.