Perhaps you should try some spelling variations:
vat thanh » dat thanh, gat thanh, tat thanh
hieu van » hieu va, thien van, lieu va
dam thuc » am thuc, dan thuc, nam thuc
vu sach » vu bach, su sach, vu khach
cao hoi » cau hoi, co hoi, cao hoc
van dam » van nam, van dao, van dau
va hanh » van hanh, va thanh, va danh
vu sac » vu san, va sac, vu cac
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sac) or (vu sach)) ky nang cao hoi. hieu van dam thuc ((vat thanh) or (va hanh)) vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sac) OR (vu sach)) ky nang cao hoi. hieu van dam thuc ((vat thanh) OR (va hanh)) vi cua tu.
• Adding a wildcard symbol may retrieve word variants: ((vu sac) or (vu sach)) ky nang cao hoi. hieu van dam thuc ((vat thanh) or (va hanh)) vi cua tu*.