Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
va thanh » gia thanh, ban thanh, va tinh
va hanh » van hanh, va danh, ban hanh
cac xuc » cam xuc, cac nuoc, chat xuc
sach tu » sach thu, cach tu, sach ty
hieu ve » hieu va, hieu van
te sach » toc sach
sang ma » tang ma, sang tao, mang may
nang ma » tang ma, nang cao, mang may
ve cac » va cac, vien cac
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: te sach tu ((nang ma) OR (sang ma)) hoi. hieu ve cac xuc ((va hanh) or (va thanh)) vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu ((nang ma) OR (sang ma)) hoi. hieu ve cac xuc ((va hanh) OR (va thanh)) vi su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tu ((nang ma) OR (sang ma)) hoi. hieu ve cac xuc ((va hanh) or (va thanh)) vi su triet".
• Adding a wildcard symbol may retrieve word variants: te sach tu ((nang ma) OR (sang ma)) hoi. hieu ve cac xuc ((va hanh) or (va thanh)) vi su triet*.