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