Perhaps you should try some spelling variations:
cham tuc » nham thuc, pham thuc, tham thuc
dua tren » dung tren
tu sach » thu sach, su sach, te sach
va hanh » van hanh, va thanh, ban hanh
sach tu » sach thu, cach tu, sach ty
va danh » va dinh, va dan, dia danh
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
lang xa » lang ha, dang xay, lang van
tu lang » cu lang, tu lanh, xu lang
cuu tre » cua tre, cau tren, cau treo

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu lang xa hoi. hieu vu cham tuc ((va danh) OR (va hanh)) vi ((dua tren) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tu lang xa hoi. hieu vu cham tuc ((va danh) OR (va hanh)) vi ((dua tren) or (cuu tre))~".
• Adding a wildcard symbol may retrieve word variants: tu sach tu lang xa hoi. hieu vu cham tuc ((va danh) OR (va hanh)) vi ((dua tren) or (cuu tre))*.