Perhaps you should try some spelling variations:
ve triet » va trien, su triet
thien va » thien van, tien va, thien tai
nang cau » nang cao, hang cau, bang cau
hanh lam » thanh lap, hanh kem, hanh va
hanh lai » hanh tai, thanh lap, thanh loi
nang dau » hang dau, xang dau, nang du
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
va cham » va chat, va tham
soc va » hoc va, loc va, doc va

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 ((nang cau) OR (nang dau)) hoi. thien va cham soc va ((hanh lai) or (hanh lam)) ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((nang cau) OR (nang dau)) hoi. thien va cham soc va ((hanh lai) OR (hanh lam)) ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((nang cau) OR (nang dau)) hoi. thien va cham soc va ((hanh lai) or (hanh lam)) ve triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang cau) OR (nang dau)) hoi. thien va cham soc va ((hanh lai) or (hanh lam)) ve triet*.