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

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 nang)) hoa hoi. hieu ((le a) OR (le va)) 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 nang)) hoa hoi. hieu ((le a) OR (le va)) 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 nang)) hoa hoi. hieu ((le a) OR (le va)) thuc dan hanh vai cua viet".
• Adding a wildcard symbol may retrieve word variants: te sac ((ky lang) or (ky nang)) hoa hoi. hieu ((le a) OR (le va)) thuc dan hanh vai cua viet*.