Perhaps you should try some spelling variations:
bui khac » bui nhat
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
vu khac » vu kham, vu khanh
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
vi ca » vit ca, li ca, va ca

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