Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
lai cua » hai cua, lai chau, thai cua
xuc van » duc van, luc van, vuc van
nam xuc » cam xuc, nam xua, nam thuc
tu sach » thu sach, su sach, te sach
ly vang » ly hang, ly van, ly quang
ly nang » ky nang, ly hang, ly quang
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 nang) OR (ly vang)) 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 nang) OR (ly vang)) 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 nang) OR (ly vang)) 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 nang) OR (ly vang)) x hoi. hieu van nam xuc van hanh ((lai cua) or (dai cua)) tre*.