Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
hanh va » hang va, hanh vi
xuc van » duc van, luc van, vuc van
cau xuc » cam xuc, cau luc, cau truc
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
xang ma » tang ma, sang ma, rang ma
va cau » van cau, va cac, va dau

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 ((xang ma) OR (nang ma)) hoi. hieu va cau xuc van ((hanh tai) or (hanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((xang ma) OR (nang ma)) hoi. hieu va cau xuc van ((hanh tai) OR (hanh va)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((xang ma) OR (nang ma)) hoi. hieu va cau xuc van ((hanh tai) or (hanh va)) cua tre*".