Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hieu van » hieu va, thien van, lieu va
sach ky » sac ky, sach y, sach ty
hanh de » hanh ve, hanh kem
hanh di » hanh vi, hang di, danh di
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, su sach, te sach
van cau » van dau, van hau, van chat
tuc va » truc va, tuc xa, duc va
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 ky nang x hoi. hieu van cau ((tuc va) OR (thuc va)) ((hanh di) or (hanh de)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. hieu van cau ((tuc va) OR (thuc va)) ((hanh di) OR (hanh de)) cua viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x hoi. hieu van cau ((tuc va) OR (thuc va)) ((hanh di) or (hanh de)) cua viet*".