Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
hanh te » hanh tu, hanh ve, hanh de
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
tuc va » thuc va, truc va, tuc xa
te cua » tue cua, le cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (su sach)) y nang ma hoi. hieu va cac ((tuc va) or (duc va)) hanh te cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) y nang ma hoi. hieu va cac ((tuc va) OR (duc va)) hanh te cua triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) y nang ma hoi. hieu va cac ((tuc va) or (duc va)) hanh te cua triet*.