Perhaps you should try some spelling variations:
tham thuc » nham thuc, tam thuc, thai thuc
sach tham » sach nha
pham thuc » phap thuc, pham chuc, nham thuc
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
sach ty » sach y, sach tu, sach thu
lang ha » long ha
cuu tre » cua tre, cau tren, cau treo
ha hoi » hoa hoi, ha noi, xa hoi
va cuu » va cau, va chu, va huu

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 tham)) lang ha hoi. lieu va ((tham thuc) or (pham thuc)) va hanh va cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach tham)) lang ha hoi. lieu va ((tham thuc) OR (pham thuc)) va hanh va cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach tham)) lang ha hoi. lieu va ((tham thuc) or (pham thuc)) va hanh va cuu tre*.