Perhaps you should try some spelling variations:
cua triet » su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
hanh lai » hanh lam, hanh tai, thanh lap
cua viet » ca viet, hoa viet, cua vat
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
va hanh » van hanh, va thanh, va danh
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 ((pham duc) or (cham soc)) va hanh lai ((cua triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nang ma hoi. hieu va ((pham duc) OR (cham soc)) va hanh lai ((cua triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang ma hoi. hieu va ((pham duc) or (cham soc)) va hanh lai ((cua triet) or (cua viet))*.