Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
vinh cuu » dinh cuu, sinh cua, tinh cua
tu sach » thu sach, su sach, te sach
van lam » van nam
lam tuc » lam thuoc, lam truoc, luat tuc
tuc gia » tac gia, duc gia, toc gia
dinh cu » dinh cuu, dinh chuc, dinh chau
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, 5 hoi

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 y nang ((x hoi) or (x ho)). hieu van lam tuc gia thanh ((vinh cuu) OR (dinh cu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ((x hoi) OR (x ho)). hieu van lam tuc gia thanh ((vinh cuu) OR (dinh cu)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ((x hoi) or (x ho)). hieu van lam tuc gia thanh ((vinh cuu) OR (dinh cu)) tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ((x hoi) or (x ho)). hieu van lam tuc gia thanh ((vinh cuu) OR (dinh cu)) tre*.