Perhaps you should try some spelling variations:
sach kem » hanh kem
hanh tai » thanh tai, hang tai, han tai
van hanh » van thanh, ban hanh, van anh
tai cuu » tai cuc, tai buu, tai cua
tuc van » thuc van, truc van, tuc va
vu cham » va cham, vu kham, tu cham
cuu tre » cua tre, cau tren, cau treo
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cham, ve cac, va cam

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 kem) or (sach y)) nang ma hoi. hieu ((ve cam) or (vu cham)) tuc van hanh tai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach kem) OR (sach y)) nang ma hoi. hieu ((ve cam) OR (vu cham)) tuc van hanh tai cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach kem) or (sach y)) nang ma hoi. hieu ((ve cam) or (vu cham)) tuc van hanh tai cuu tre*.