Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
van cam » van nam, van lam, van cau
truc va » thuc va, thuc vat, trung va
hanh de » hanh ve, hanh kem
y nang » ky nang, ly nang, v nang
xuc va » tuc va, luc va, xac va
de cua » le cua, te cua, dieu 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 y nang x hoi. hieu van cam ((((xuc va) or (duc va))) or (truc va)) hanh de cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang x hoi. hieu van cam ((((xuc va) OR (duc va))) OR (truc va)) hanh de cua vat.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. hieu van cam ((((xuc va) or (duc va))) or (truc va)) hanh de cua vat*.