Perhaps you should try some spelling variations:
cua viet » hoa viet, cua vat, cua dieu
sach ty » sach tu, sach thu, xach tay
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
ca viet » va viet, co viet, hoa viet
ve cam » ve cham, ve cac, va cam
cam tu » cam thu, nam tu, dam tu
x hoi » xa hoi, o hoi, x ho

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 y) or (sach ty)) nang x hoi. hieu ve cam tu va hanh vi ((cua viet) or (ca viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach y) OR (sach ty)) nang x hoi. hieu ve cam tu va hanh vi ((cua viet) OR (ca viet)).
• Adding a wildcard symbol may retrieve word variants: su ((sach y) or (sach ty)) nang x hoi. hieu ve cam tu va hanh vi ((cua viet) or (ca viet))*.