Perhaps you should try some spelling variations:
thuoc sach » hoc sach, thuat sach, thuoc sinh
nuoc sach » nguoi sach, hoc sach, cuoc cach
van hanh » van thanh, ban hanh, van anh
nang ma » tang ma, sang ma, nang cao
cac dat » cac dan, cai dat, cac dai
va hanh » va thanh, va danh, ban hanh
ma hoi » mai hoi, xa hoi, ma hoa
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: ((thuoc sach) OR (nuoc sach)) ky nang ma hoi. lieu va cac dat ((va hanh) or (van hanh)) vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (nuoc sach)) ky nang ma hoi. lieu va cac dat ((va hanh) OR (van hanh)) vi cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) OR (nuoc sach)) ky nang ma hoi. lieu va cac dat ((va hanh) or (van hanh)) vi cua vat".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) OR (nuoc sach)) ky nang ma hoi. lieu va cac dat ((va hanh) or (van hanh)) vi cua vat*.