Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh doi » thanh doi, hanh noi, hang doi
cua viet » ca viet, hoa viet, cua vat
te sach » toc sach
lv nang » ly nang
van cam » van nam, van lam, van cau
doi cua » dai cua, hoi cua, dong cua
v nang » va nang, vu nang, van nang
xuc va » tuc va, luc va, xac 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: te sach ((v nang) or (lv nang)) x hoi. hieu van cam ((xuc va) or (duc va)) hanh doi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((v nang) OR (lv nang)) x hoi. hieu van cam ((xuc va) OR (duc va)) hanh doi cua viet.
• Adding a wildcard symbol may retrieve word variants: te sach ((v nang) or (lv nang)) x hoi. hieu van cam ((xuc va) or (duc va)) hanh doi cua viet*.