Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
tang van » dang van, hoang van, trong van
hoc sach » hoc sinh, hoc cac, hoc anh
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
ky tang » ky nang, ky dang, kho tang
van cua » vang cua, ban cua, dan cua
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: ((tu sach) or (hoc sach)) ky tang van hoa. 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: ((tu sach) OR (hoc sach)) ky tang van hoa. 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: "((tu sach) or (hoc sach)) ky tang van hoa. hieu ((va cam) OR (va cac)) duc va thanh van cua vat".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (hoc sach)) ky tang van hoa. hieu ((va cam) OR (va cac)) duc va thanh van cua vat*.