Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
nam duc » nam duoc, pham duc, nam thuc
sach ky » sac ky, sach y, sach kem
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
hieu va » hieu qua
vi cua » vai cua, di cua

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) or (sach ty)) nang xa hoi. ((hieu va) OR (lieu va)) nam duc va thanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach ty)) nang xa hoi. ((hieu va) OR (lieu va)) nam duc va thanh vi cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) or (sach ty)) nang xa hoi. ((hieu va) OR (lieu va)) nam duc va thanh vi cua viet".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (sach ty)) nang xa hoi. ((hieu va) OR (lieu va)) nam duc va thanh vi cua viet*.