Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cay mang » cach mang, cay mac, day manh
cay cong » cac cong, cao cong, cau cong
va hanh » van hanh, va thanh, va danh
cac bac » cac bai, cac ban, cac cach
cac dac » cac dan, cac dai, cac tac
hieu ve » hieu va, hieu van
cua tuc » cua duc, cua tu, cua thuoc
tay hoi » tay ho, tao hoi, tay thai
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 cong)) tay hoi. hieu ve ((cac dac) OR (cac bac)) va hanh vi cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((cay mang) OR (cay cong)) tay hoi. hieu ve ((cac dac) OR (cac bac)) va hanh vi cua tuc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((cay mang) or (cay cong)) tay hoi. hieu ve ((cac dac) OR (cac bac)) va hanh vi cua tuc".
• Adding a wildcard symbol may retrieve word variants: thu sach ((cay mang) or (cay cong)) tay hoi. hieu ve ((cac dac) OR (cac bac)) va hanh vi cua tuc*.