Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
thuc dan » thuc hanh, hoc dan, thuc vat
sach ty » sach y, sach tu, xach tay
hanh va » hang va, hanh vi
van cam » van nam, van lam, van cau
thi van » thi lan, thi hanh, thi nang
xang ma » tang ma, nang ma, sang ma
cau tre » cau tren, cau treo, cau tra
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, tuc va, luc va
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: tu ((sach ty) or (sach thu)) xang ma hoi. thi van cam ((xuc va) or (thuc dan)) hanh va cau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach thu)) xang ma hoi. thi van cam ((xuc va) OR (thuc dan)) hanh va cau tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach thu)) xang ma hoi. thi van cam ((xuc va) or (thuc dan)) hanh va cau tre*.