Perhaps you should try some spelling variations:
thuat sac » thuat sach, thuat san, thuat tac
may khoa » da khoa, ly khoa, y khoa
dinh vai » dinh van, dinh vi, dinh va
vai cua » dai cua, hai cua, lai cua
thuc va » thuc vat, thuc dan, thuc day
ve cham » va cham, ve chat, vu cham
ky mang » ky nang, ke mang, ky dang
sac ky » cac ky, sai ky
tuc va » truc va, tuc xa, duc va
ve cac » va cac, vien cac
cua cu » cua chu, cua cau, cua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sac ky mang may khoa. hieu ((ve cac) or (ve cham)) ((tuc va) OR (thuc va)) dinh vai cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sac ky mang may khoa. hieu ((ve cac) OR (ve cham)) ((tuc va) OR (thuc va)) dinh vai cua cu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sac ky mang may khoa. hieu ((ve cac) or (ve cham)) ((tuc va) OR (thuc va)) dinh vai cua cu*".