Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
thanh vi » hanh vi, thanh va, thanh ve
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
tuc va » thuc va, truc va, duc va
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam
ma hoi » mai hoi, xa hoi, ma hoa

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 y nang ma hoi. hieu ve cam ((tuc va) OR (tuc xa)) thanh vi ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ma hoi. hieu ve cam ((tuc va) OR (tuc xa)) thanh vi ((cua triet) OR (va triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ma hoi. hieu ve cam ((tuc va) OR (tuc xa)) thanh vi ((cua triet) or (va triet))".
• Adding a wildcard symbol may retrieve word variants: su sach y nang ma hoi. hieu ve cam ((tuc va) OR (tuc xa)) thanh vi ((cua triet) or (va triet))*.