Perhaps you should try some spelling variations:
dat duoc » dat nuoc, da duoc, luat duoc
cua viet » hoa viet, cua vat, cua dieu
thanh vi » hanh vi, thanh va, thanh ve
sach thu » sach thue, sach thieu, sach tham
va thanh » gia thanh, ban thanh, va tinh
duoc va » nuoc va, duc va, duoc ma
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
ca viet » va viet, co viet, hoa viet
va dat » va dao, va dau, va dap

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 thu)) nang xa hoi. lieu va dat duoc va thanh vi ((cua viet) or (ca viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach thu)) nang xa hoi. lieu va dat duoc va thanh vi ((cua viet) OR (ca viet)).
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (sach thu)) nang xa hoi. lieu va dat duoc va thanh vi ((cua viet) or (ca viet))*.