Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
nang cai » nang cao, nang tai, nang cap
thuc cac » thuc cach, tuc cac, phuc cac
nam thuc » nam thuoc, am thuc, nam thu
nang nam » dang nam, hang nam, nang lam
thi nang » thi cong, ki nang, thi hanh
sach ky » sac ky, sach kem, sach hay
sach ty » sach tu, sach thu, xach tay
cai hoi » cau hoi, dai hoi, cai hoa
dan va » doan va, dan ca, ban va
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((((sach ky) or (sach ty))) or (sach y)) nang cai hoi. thi nang nam thuc cac dan va cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((((sach ky) OR (sach ty))) OR (sach y)) nang cai hoi. thi nang nam thuc cac dan va cua viet*.