Perhaps you should try some spelling variations:
xach tay » canh tay
hieu van » hieu va, thien van, lieu va
dau thuc » dan thuc, dai thuc, dam thuc
thuc day » thuc dan, thuc vat
day hanh » day nhanh, day thanh, dao hanh
hanh lai » hanh lam, hanh tai, thanh lap
cua viet » ca viet, hoa viet, cua vat
nang xa » nang x, lang xa, nang ma
van dau » van dao, phan dau
lai cua » dai cua, hai cua, lai chau

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) or (xach tay)) nang xa hoi. hieu van dau thuc day hanh lai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach y) OR (xach tay)) nang xa hoi. hieu van dau thuc day hanh lai cua viet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach y) or (xach tay)) nang xa hoi. hieu van dau thuc day hanh lai cua viet*.