Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
tinh lam » trinh lam, dinh lam, tinh lao
lam cua » nam cua, lam chat
va tinh » may tinh
sach ty » sach y, sach thu, xach tay
sach tu » sach thu, cach tu, sach uu
nang o » nang co, nang ho, nang ro
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu ((sach ty) OR (sach tu)) nang o hoi. hieu ((ve cam) or (va cam)) xuc va tinh lam cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach ty) OR (sach tu)) nang o hoi. hieu ((ve cam) OR (va cam)) xuc va tinh lam cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((sach ty) OR (sach tu)) nang o hoi. hieu ((ve cam) or (va cam)) xuc va tinh lam cua viet".
• Adding a wildcard symbol may retrieve word variants: vu ((sach ty) OR (sach tu)) nang o hoi. hieu ((ve cam) or (va cam)) xuc va tinh lam cua viet*.