Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh thai » nhanh thai, hinh thai, hanh tai
cham duc » pham duc, cham soc, pham duy
ban hanh » ban hang
cua tre » cua te, cuu tre, dua tren
duc ban » duc tan, duc van, dua ban
sach ky » sac ky, sach ty, sach kem
hieu ve » hieu va, hieu van
nang co » nang cao, nang doc, nang noi
ve cham » va cham, ve chat, vu cham

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 ky) or (sach y)) nang co hoc. hieu ve cham duc ban hanh thai ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) nang co hoc. hieu ve cham duc ban hanh thai ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sach y)) nang co hoc. hieu ve cham duc ban hanh thai ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach y)) nang co hoc. hieu ve cham duc ban hanh thai ((cua tre) OR (cua triet))*.