Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
tang mai » tang ma, tang tai, lang mai
thuc dan » thuc hanh, hoc dan, thuc vat
dan dinh » dang dinh, doan dinh, van dinh
dinh vai » dinh van, dinh vi, dinh va
sach ky » sac ky, sach ty, sach kem
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
vai cua » dai cua, hai cua, lai cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach ky) OR (sach y)) tang mai hoi. hieu ve cham thuc dan dinh vai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ky) OR (sach y)) tang mai hoi. hieu ve cham thuc dan dinh vai cua te".
• Adding a wildcard symbol may retrieve word variants: thu ((sach ky) OR (sach y)) tang mai hoi. hieu ve cham thuc dan dinh vai cua te*.