Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cham duc » pham duc, cham soc, pham duy
hanh lam » thanh lap, hanh kem, hanh va
hanh lai » hanh tai, thanh lap, thanh loi
thu sach » tu sach, thuat sach, thuoc sach
hieu va » hieu qua
sach ty » sach y, sach tu, sach thu
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
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: thu sach ty nang ma hoi. ((hieu va) or (lieu va)) cham duc va ((hanh lai) OR (hanh lam)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nang ma hoi. ((hieu va) OR (lieu va)) cham duc va ((hanh lai) OR (hanh lam)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty nang ma hoi. ((hieu va) or (lieu va)) cham duc va ((hanh lai) OR (hanh lam)) cua triet".
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang ma hoi. ((hieu va) or (lieu va)) cham duc va ((hanh lai) OR (hanh lam)) cua triet*.