Perhaps you should try some spelling variations:
thanh lam » thanh lap, hanh lam, thanh nam
su triet » su viet, su tien, ve triet
sach ky » sach y, sach ty, sach kem
hieu ve » hieu va, hieu van
sac ky » cac ky, sai ky
nang o » nang co, nang ho, nang ro
ve cam » ve cham, ve cac, va cam
xuc va » tuc va, luc va, xac va
lam su » lai su, lam so, lam vu
o hai » co hai, so hai, o lai

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu ((sach ky) OR (sac ky)) nang o hai. hieu ve cam ((xuc va) or (duc va)) thanh lam su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach ky) OR (sac ky)) nang o hai. hieu ve cam ((xuc va) OR (duc va)) thanh lam su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((sach ky) OR (sac ky)) nang o hai. hieu ve cam ((xuc va) or (duc va)) thanh lam su triet".
• Adding a wildcard symbol may retrieve word variants: vu ((sach ky) OR (sac ky)) nang o hai. hieu ve cam ((xuc va) or (duc va)) thanh lam su triet*.