Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
toc sach » hoc sach, doc sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
co sach » bo sach, cuon sach, hoc sach
nang ma » tang ma, sang ma, nang cao
van cua » vang cua, ban cua, dan cua
ma hoi » mai hoi, xa hoi, ma hoa
va cam » va cham, va cao, va cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (co sach)) ky nang ma hoi. hieu ((va cam) OR (va cac)) duc va thanh van cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (co sach)) ky nang ma hoi. hieu ((va cam) OR (va cac)) duc va thanh van cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (co sach)) ky nang ma hoi. hieu ((va cam) OR (va cac)) duc va thanh van cua vat".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (co sach)) ky nang ma hoi. hieu ((va cam) OR (va cac)) duc va thanh van cua vat*.