Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
cau tren » cu tren, dau tren, ca tren
thanh vi » hanh vi, thanh va, thanh ve
soc gia » toc gia, hoc gia, so gia
ve cham » va cham, ve chat, vu cham
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
sang ma » tang ma, nang ma, sang tao
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky ((nang xa) or (sang ma)) hoi. hieu ve cham soc gia thanh vi ((cau tren) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((nang xa) OR (sang ma)) hoi. hieu ve cham soc gia thanh vi ((cau tren) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang xa) or (sang ma)) hoi. hieu ve cham soc gia thanh vi ((cau tren) or (su triet))*.