Perhaps you should try some spelling variations:
lang chai » lang ha, lang cua, lang phi
thanh van » thanh san, thanh toan, thanh phan
cham tuc » nham thuc, pham thuc, tham thuc
lang dai » lang hai, lang mai, hoang dai
tu sach » thu sach, su sach, te sach
hanh va » hang va, hanh vi
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, tuc xa

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 ky ((lang dai) OR (lang chai)) khoi. hieu ve cham tuc va ((thanh van) or (hanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((lang dai) OR (lang chai)) khoi. hieu ve cham tuc va ((thanh van) OR (hanh va)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((lang dai) OR (lang chai)) khoi. hieu ve cham tuc va ((thanh van) or (hanh va)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((lang dai) OR (lang chai)) khoi. hieu ve cham tuc va ((thanh van) or (hanh va)) cua tre*.