Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cay cong » cac cong, cao cong, cau cong
cay mang » cach mang, day manh, cay dan
tay hoi » tay ho, tao hoi, tay thai
hieu ve » hieu va, hieu van
cac dac » cac dan, cac dai, cac bac
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
cua tuc » cua duc, cua tu, cua thuoc
ve cac » va cac, vien cac
dac va » duc va, day va, dat va
vi cua » vai cua, di cua

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 ((((cay mang) or (cay mac))) or (cay cong)) tay hoi. hieu ve cac dac va danh vi cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((((cay mang) OR (cay mac))) OR (cay cong)) tay hoi. hieu ve cac dac va danh vi cua tuc.
• Adding a wildcard symbol may retrieve word variants: thu sach ((((cay mang) or (cay mac))) or (cay cong)) tay hoi. hieu ve cac dac va danh vi cua tuc*.