Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thu sach » thuat sach, thuoc sach, thu hoach
cham duc » cham soc, pham duy, phan duc
tu sach » su sach, te sach, tu cach
tu nang » tru nang, tu nong, tu nano
hieu vu » hieu va, hieu ve, hieu su
va hanh » van hanh, va thanh, va danh
hanh de » hanh ve, hanh kem
de cua » le cua, te cua, dieu 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 (thu sach)) tu nang x ho. hieu vu ((cham duc) or (pham duc)) va hanh de cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) tu nang x ho. hieu vu ((cham duc) OR (pham duc)) va hanh de cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) tu nang x ho. hieu vu ((cham duc) or (pham duc)) va hanh de cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) tu nang x ho. hieu vu ((cham duc) or (pham duc)) va hanh de cua triet*.