Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
va thanh » gia thanh, ban thanh, va tinh
hieu van » hieu va, thien van, lieu va
vai cua » dai cua, hai cua, lai cua
van cac » van hac, van cau, van bac
sach ty » sach tu, sach thu, xach tay
hang ca » hang va, hang tai, hang dau
cua tuc » cua duc, cua tu, cua thuoc
du va » dau va, tu va, su va

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((sach ty) OR (sach y)) ((hang ca) or (nang cao)) hoi. hieu van cac du va thanh vai cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((sach ty) OR (sach y)) ((hang ca) OR (nang cao)) hoi. hieu van cac du va thanh vai cua tuc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((sach ty) OR (sach y)) ((hang ca) or (nang cao)) hoi. hieu van cac du va thanh vai cua tuc".
• Adding a wildcard symbol may retrieve word variants: doc ((sach ty) OR (sach y)) ((hang ca) or (nang cao)) hoi. hieu van cac du va thanh vai cua tuc*.