Perhaps you should try some spelling variations:
sang tao » hang tai
sang lap » sang ma, sang tai, dan lap
hieu van » hieu va, thien van, lieu va
cau phuc » cau truc, chau phu, huu phuc
bo sach » co sach, hoc sach
phuc va » phuc vu, thuc va, chuc va
danh vi » hanh vi, dinh vi, danh di
hieu ve » hieu va
sach ky » sac ky, sach y, sach ty
va danh » va dinh, va dan, va hanh
vi cua » vai cua, di cua
cua cu » cua chu, cua cau, cua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: bo sach ky ((sang lap) or (sang tao)) hai. ((hieu ve) or (hieu van)) cau phuc va danh vi cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach ky ((sang lap) OR (sang tao)) hai. ((hieu ve) OR (hieu van)) cau phuc va danh vi cua cu.
• Adding a wildcard symbol may retrieve word variants: bo sach ky ((sang lap) or (sang tao)) hai. ((hieu ve) or (hieu van)) cau phuc va danh vi cua cu*.