Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van than » van thanh, van thang, van tuan
than luc » nhan luc, than duc, thanh luu
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
hai cua » thai cua, hoi cua, lai cua
sach v » sach va, sach 2, sach vay
luc va » duc va, tuc va, loc va

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