Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hieu van » hieu va, thien van, lieu va
hanh lai » hanh lam, hanh tai, thanh lap
van hanh » van thanh, ban hanh, van anh
pham duy » pham duc
xach tay » canh tay
lai cua » dai cua, hai cua, lai chau
duy van » duy vat, dung van
hieu ve » hieu 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 ((xach tay) or (sach y)) nang x hoi. ((hieu ve) OR (hieu van)) pham duy van hanh lai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((xach tay) OR (sach y)) nang x hoi. ((hieu ve) OR (hieu van)) pham duy van hanh lai cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((xach tay) or (sach y)) nang x hoi. ((hieu ve) OR (hieu van)) pham duy van hanh lai cua viet".
• Adding a wildcard symbol may retrieve word variants: tu ((xach tay) or (sach y)) nang x hoi. ((hieu ve) OR (hieu van)) pham duy van hanh lai cua viet*.