Perhaps you should try some spelling variations:
thien van » thi van
thanh dai » thanh hai, thanh tai, thanh dat
thi nang » thi cong, ki nang, thi hanh
va thanh » gia thanh, ban thanh, va tinh
te sach » toc sach
ty hang » ly hang, thi hang, thu hang
cac duc » cac du, cao duc, cac dac
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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