Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
toc sach » hoc sach, thuoc sach, nuoc sach
doc sach » hoc sach, nuoc sach, dac sac
va thanh » gia thanh, ban thanh, va tinh
vai cua » dai cua, hai cua, lai cua
hieu va » lieu va, hieu qua
cua tuc » cua duc, cua tu, cua thuoc
hanh ca » hanh cac, hanh cat, hanh cua
bac du » cac du, tac du
bac tu » ban tu, tac tu, cac tu
ca hoi » cau hoi, cua hoi, xa hoi

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 (doc sach)) thuc hanh ca hoi. hieu va ((bac du) or (bac tu)) va thanh vai cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (doc sach)) thuc hanh ca hoi. hieu va ((bac du) OR (bac tu)) va thanh vai cua tuc.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (doc sach)) thuc hanh ca hoi. hieu va ((bac du) or (bac tu)) va thanh vai cua tuc*.