Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
khoa hoi » khoan hoi, khoa hoc, khoa doi
hanh vai » hanh vi, hanh va, hanh tai
dan hanh » dang hanh, dan khanh, dan thanh
thuc dan » thuc hanh, hoc dan, thuc vat
hoa hoi » hoa hoc, hoa doi, hoc hoi
hieu le » hieu ve, hieu he, hieu ly
ky dang » ky nang, ky danh
ky lang » ky nang, ky tang, tay lang
vai cua » dai cua, hai cua, lai cua
a thuc » am thuc, va thuc, ha thuc
te sac » te sach, te cac, te san
le a » le va, le ta, le ha

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

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