Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sang ma » tang ma, nang ma, sang tao
hieu va » lieu va, hieu qua
va cham » va chat, va tham
danh vi » hanh vi, dinh vi, danh di
xuc va » tuc va, luc va, xac va
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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 y ((sang ma) or (mang may)) hoi. hieu va cham ((xuc va) or (duc va)) danh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((sang ma) OR (mang may)) hoi. hieu va cham ((xuc va) OR (duc va)) danh vi cua tu.
• Adding a wildcard symbol may retrieve word variants: tu sach y ((sang ma) or (mang may)) hoi. hieu va cham ((xuc va) or (duc va)) danh vi cua tu*.