Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
sach ly » sach lo, sach ty, sach hay
nam xuc » cam xuc, nam xua, nam thuc
xuc van » duc van, luc van, vuc van
lai cua » hai cua, lai chau, thai cua
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: tu ((sach ly) OR (sach y)) nang x hoi. hieu van nam xuc van hanh ((lai cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ly) OR (sach y)) nang x hoi. hieu van nam xuc van hanh ((lai cua) OR (dai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ly) OR (sach y)) nang x hoi. hieu van nam xuc van hanh ((lai cua) or (dai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ly) OR (sach y)) nang x hoi. hieu van nam xuc van hanh ((lai cua) or (dai cua)) tre*.