Perhaps you should try some spelling variations:
tang tao » sang tao, tang tai, nang tao
tao khoi » tao hoi, thao khoa, lao khoa
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
hanh va » hang va, hanh vi
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
ty tang » tay tang, ty xang, ty hang
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty tang tao khoi. ((hieu ve) or (lieu va)) cam ((xuc va) or (tuc va)) hanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty tang tao khoi. ((hieu ve) OR (lieu va)) cam ((xuc va) OR (tuc va)) hanh va cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ty tang tao khoi. ((hieu ve) or (lieu va)) cam ((xuc va) or (tuc va)) hanh va cua tre*.