Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nang mai » nang ma, nang tai, lang mai
cuu tre » cua tre, cau tren, cau treo
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
mai hoi » mai khoi, dai hoi, lai hoi
va cam » va cham, va cac, va cao
ve cac » va cac, vien cac

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 nang mai hoi. hieu ((ve cac) or (va cam)) thuc va hanh vi ((cuu tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang mai hoi. hieu ((ve cac) OR (va cam)) thuc va hanh vi ((cuu tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang mai hoi. hieu ((ve cac) or (va cam)) thuc va hanh vi ((cuu tre) or (cua triet))*.