Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hanh lam » thanh lap, hanh kem, dinh lam
chat tuc » chat xuc, luat tuc, chat huu
hieu van » hieu va, thien van, lieu va
van chat » cao chat
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
hanh va » hang va, hanh vi
su sach » so sach, vu sach
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty ((nang xa) or (nang cao)) hoi. hieu van chat tuc va ((hanh lam) or (hanh va)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((nang xa) OR (nang cao)) hoi. hieu van chat tuc va ((hanh lam) OR (hanh va)) va triet.
• Adding a wildcard symbol may retrieve word variants: su sach ty ((nang xa) or (nang cao)) hoi. hieu van chat tuc va ((hanh lam) or (hanh va)) va triet*.