Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh hai, thanh van
ban thanh » ban hanh, ban hang
toc sach » doc sach, thuoc sach, nuoc sach
hoc sach » hoc sinh, hoc cac, hoc anh
hieu ve » hieu va, hieu van
dat cua » dai cua, day cua, mat cua
ly nang » ky nang, ly hang, ly vang
du ban » dua ban, duc ban, du bao
ve cac » va cac, vien cac
ma hoi » mai hoi, xa hoi, ma hoa
y nang » ky nang, v nang, may nang
cua tu » cua tuc, cua su, cua cu

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: ((toc sach) OR (hoc sach)) ((y nang) OR (ly nang)) ma hoi. hieu ve cac du ban thanh dat cua tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (hoc sach)) ((y nang) OR (ly nang)) ma hoi. hieu ve cac du ban thanh dat cua tu~".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (hoc sach)) ((y nang) OR (ly nang)) ma hoi. hieu ve cac du ban thanh dat cua tu*.