Perhaps you should try some spelling variations:
khanh lai » khanh luan, thanh lap, thanh loi
xa khanh » xa thanh, van khanh, dat khanh
su sach » so sach
ve cham » va cham, ve chat, vu cham
nang ma » tang ma, sang ma, nang cao
vu sach » vu bach, vu khach
su viet » so viet
ve cam » ve cac, va cam, ve cai
v nang » va nang, vu nang, van nang

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) or (vu sach)) v nang ma hoa. hieu ((ve cam) OR (ve cham)) tuc xa khanh lai su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) v nang ma hoa. hieu ((ve cam) OR (ve cham)) tuc xa khanh lai su viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) v nang ma hoa. hieu ((ve cam) OR (ve cham)) tuc xa khanh lai su viet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) v nang ma hoa. hieu ((ve cam) OR (ve cham)) tuc xa khanh lai su viet*.