Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
thanh vi » hanh vi, thanh va, thanh ve
xa thanh » va thanh, ha thanh, ta thanh
sach ty » sach tu, sach thu, xach tay
cac tac » cac toc, cac bac, cac dac
hieu ve » hieu va, hieu van
nang ho » nang hoc, nang co, tang ho
nang ro » nang co, nang ra, nang rong
ve cac » va cac, vien cac
tac xa » tuc xa, tac da
vi su » va su, ve su, ki su

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 ty) or (sach y)) ((nang ro) OR (nang ho)) hoi. hieu ve cac tac xa thanh vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach y)) ((nang ro) OR (nang ho)) hoi. hieu ve cac tac xa thanh vi su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) or (sach y)) ((nang ro) OR (nang ho)) hoi. hieu ve cac tac xa thanh vi su triet*".