Perhaps you should try some spelling variations:
khanh lai » khanh luan, thanh lap, thanh loi
va triet » va thiet, va trien, ve triet
xa khanh » xa thanh, van khanh, dat khanh
su sach » so sach, vu sach
ly vang » ly hang, ly van, ly quang
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao
lai va » loai va, mai va, dai va
ve cam » ve cham, ve cac, ve cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((y nang) or (ly vang)) ma hoa. hieu ((ve cam) OR (va cam)) tuc xa khanh lai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (ly vang)) ma hoa. hieu ((ve cam) OR (va cam)) tuc xa khanh lai va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) or (ly vang)) ma hoa. hieu ((ve cam) OR (va cam)) tuc xa khanh lai va triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) or (ly vang)) ma hoa. hieu ((ve cam) OR (va cam)) tuc xa khanh lai va triet*.