Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang ra » nang ma, lang ra, nang ro
hieu ve » hieu va, hieu van
ra hai » tra hai, ta hai, va hai
ve cam » ve cham, ve cac, va cam
xac va » tac va, ac va, bac va
luc va » tuc va, loc va
vi cua » vai cua, di cua

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 ra hai. hieu ve cam ((((xac va) or (luc va))) or (duc va)) hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang ra hai. hieu ve cam ((((xac va) OR (luc va))) OR (duc va)) hanh vi cua triet.
• Adding a wildcard symbol may retrieve word variants: su sach ty nang ra hai. hieu ve cam ((((xac va) or (luc va))) or (duc va)) hanh vi cua triet*.