Perhaps you should try some spelling variations:
dau tieng » cau tieng, day tieng, mau tieng
dau tien » van tien
sach ty » sach y, sach thu, xach tay
sach tu » sach thu, cach tu, sach uu
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cao tuc » dao tuc, cao duc, cao suc
va danh » va dinh, va dan, va hanh
danh bi » danh di, danh gia, danh bat
va cao » va cac, va co, va dao
tuc va » thuc va, truc va, tuc xa

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 ty) OR (sach tu)) nang xa hoi. hieu va cao tuc va danh bi ((dau tieng) or (dau tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach tu)) nang xa hoi. hieu va cao tuc va danh bi ((dau tieng) OR (dau tien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) OR (sach tu)) nang xa hoi. hieu va cao tuc va danh bi ((dau tieng) or (dau tien))".
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) OR (sach tu)) nang xa hoi. hieu va cao tuc va danh bi ((dau tieng) or (dau tien))*.