Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hanh vai » hanh vi, hanh va, hanh tai
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
dang ha » dong ha, dung ha, lang ha
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
vai cua » dai cua, hai cua, lai cua
ha hoi » hoa hoi, ha noi, 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: tu sach ky dang ha hoi. hieu ve ((cam tuc) or (am thuc)) van hanh vai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang ha hoi. hieu ve ((cam tuc) OR (am thuc)) van hanh vai cua vat.
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang ha hoi. hieu ve ((cam tuc) or (am thuc)) van hanh vai cua vat*.