Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
tam thuc » tham thuc, am thuc, nam thuc
hanh tai » thanh tai, hang tai, han tai
hanh van » thanh van, khanh van, hanh va
hanh vai » hanh vi, hanh va, hanh voi
thuc ban » thuoc ban, thuc dan, thu ban
dang may » mang may, dang xay, dung may
hieu va » lieu va, hieu qua
may hoi » may thoi, tay hoi, mai hoi
ky dang » ky nang, ky danh
va tam » van tam, va tham, va tac
sac ky » cac ky, sai ky
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky dang may hoi. hieu va tam thuc ban ((((hanh vai) OR (hanh van))) or (hanh tai)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky dang may hoi. hieu va tam thuc ban ((((hanh vai) OR (hanh van))) OR (hanh tai)) cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky dang may hoi. hieu va tam thuc ban ((((hanh vai) OR (hanh van))) or (hanh tai)) cua viet".
• Adding a wildcard symbol may retrieve word variants: tu sac ky dang may hoi. hieu va tam thuc ban ((((hanh vai) OR (hanh van))) or (hanh tai)) cua viet*.