Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
duc duat » duc luat, duc dai, duc dung
te sach » toc sach
sach ky » sac ky, sach y, sach ty
van cam » van nam, van lam, van cau
xuc dat » duoc dat, quoc dat
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: te sach ky nang x hoi. hieu van cam ((xuc dat) OR (duc duat)) khanh ((lai cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang x hoi. hieu van cam ((xuc dat) OR (duc duat)) khanh ((lai cua) OR (dai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang x hoi. hieu van cam ((xuc dat) OR (duc duat)) khanh ((lai cua) or (dai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang x hoi. hieu van cam ((xuc dat) OR (duc duat)) khanh ((lai cua) or (dai cua)) tre*.