Perhaps you should try some spelling variations:
ve triet » va trien
su triet » su viet, su tien
nang dai » nang dau, nang tai, lang dai
sach ky » sac ky, sach ty, sach kem
va hanh » van hanh, va thanh, va danh
cam tuc » cam xuc, cam tu, nam thuc
hieu ve » hieu va, hieu van
dai hoi » dai hoc, dai hai, dai moi
tuc va » thuc va, truc va, tuc xa
ve cam » ve cham, ve cac, va cam

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: so ((sach ky) OR (sach y)) nang dai hoi. hieu ve cam tuc va hanh vi ((su triet) OR (ve triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach ky) OR (sach y)) nang dai hoi. hieu ve cam tuc va hanh vi ((su triet) or (ve triet))~".
• Adding a wildcard symbol may retrieve word variants: so ((sach ky) OR (sach y)) nang dai hoi. hieu ve cam tuc va hanh vi ((su triet) or (ve triet))*.