Perhaps you should try some spelling variations:
luat duoc » luat tuc
xach tay » canh tay
hanh hai » thanh hai, nhanh hai, hang hai
van hanh » van thanh, ban hanh, van anh
lam duoc » nam duoc, lam thuoc, tao duoc
hieu van » hieu va, thien van, lieu va
hai cua » thai cua, dai cua, hoi cua
lang ha » long ha
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
ha hoi » hoa hoi, ha noi, xa hoi

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 ty)) lang ha hoi. hieu van ((lam duoc) or (luat duoc)) van hanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((xach tay) OR (sach ty)) lang ha hoi. hieu van ((lam duoc) OR (luat duoc)) van hanh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((xach tay) or (sach ty)) lang ha hoi. hieu van ((lam duoc) or (luat duoc)) van hanh hai cua tre*.