Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
ban hanh » ban hang
chat xuc » chat huu, cam xuc, chao xu
hieu van » hieu va, thien van, lieu va
sach ty » sach y, sach tu, sach thu
va danh » va dinh, va dan, va hanh
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
ma hoi » mai hoi, xa hoi, ma hoa
vi su » va su, ve su, ki su

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang ma hoi. hieu van ((hac xuc) OR (chat xuc)) ((va danh) OR (ban hanh)) vi su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang ma hoi. hieu van ((hac xuc) OR (chat xuc)) ((va danh) or (ban hanh)) vi su triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang ma hoi. hieu van ((hac xuc) OR (chat xuc)) ((va danh) or (ban hanh)) vi su triet*.