Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
van hanh » van thanh, ban hanh, van anh
thuc van » thuc vat, thuc dan, thuc va
su sach » so sach, vu sach
va chat » van chat, va phat, cao chat
cua tre » cuu tre, cua triet, dua tren
sach ky » sac ky, sach y, sach ty
ve cham » va cham, ve chat, vu cham
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky lang xa hoi. hieu ((ve cham) or (va chat)) thuc van hanh dai ((cua te) or (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky lang xa hoi. hieu ((ve cham) OR (va chat)) thuc van hanh dai ((cua te) OR (cua tre)).
• Adding a wildcard symbol may retrieve word variants: su sach ky lang xa hoi. hieu ((ve cham) or (va chat)) thuc van hanh dai ((cua te) or (cua tre))*.