Perhaps you should try some spelling variations:
thanh vi » thanh va, thanh ve, nhanh vi
su sach » so sach, vu sach
vu khac » vu kham, vu khanh, bui khac
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
soc van » hoc van, oc van, sac van
ca viet » va viet, co viet, hoa viet

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 khac)) ky nang ma hoa. hieu ve cham soc van ((thanh vi) OR (hanh vi)) ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu khac)) ky nang ma hoa. hieu ve cham soc van ((thanh vi) OR (hanh vi)) ca viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu khac)) ky nang ma hoa. hieu ve cham soc van ((thanh vi) OR (hanh vi)) ca viet*".