Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
xach tay » canh tay
cua viet » ca viet, hoa viet, cua vat
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
duc van » duc va, duc manh, duc phan
lap cua » lai cua, tap cua, lam 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 ((xach tay) or (sach y)) nang x hoi. hieu ve cham ((duc van) OR (duc tan)) thanh lap 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 cham ((duc van) OR (duc tan)) thanh lap 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 cham ((duc van) OR (duc tan)) thanh lap cua viet".
• Adding a wildcard symbol may retrieve word variants: tu ((xach tay) or (sach y)) nang x hoi. hieu ve cham ((duc van) OR (duc tan)) thanh lap cua viet*.