Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh than » hanh han, hanh nhan, hanh phan
than cua » nhan cua, thai cua, ban cua
sach ky » sac ky, sach ty, sach kem
nang ro » nang co, nang ho, nang ra
hieu ve » hieu va, hieu van
xuc van » duc van, luc van, vuc van
ro hai » co hai, o hai, so hai
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu ((sach ky) OR (sach y)) nang ro hai. hieu ve cam ((xuc van) or (duc tan)) hanh than cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach ky) OR (sach y)) nang ro hai. hieu ve cam ((xuc van) OR (duc tan)) hanh than cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((sach ky) OR (sach y)) nang ro hai. hieu ve cam ((xuc van) or (duc tan)) hanh than cua triet".
• Adding a wildcard symbol may retrieve word variants: vu ((sach ky) OR (sach y)) nang ro hai. hieu ve cam ((xuc van) or (duc tan)) hanh than cua triet*.