Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
soc van » hoc van, oc van, sac van
hang di » hang doi, hang vi, hang dien
hanh di » hanh vi, hanh de, danh di
te sach » toc sach
hieu vu » hieu va, hieu ve, hieu su
nang ma » tang ma, sang ma, nang cao
vu cham » va cham, vu kham, tu cham
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (thu hoach)) ky nang ma hoi. hieu vu cham soc van ((hanh di) or (hang di)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thu hoach)) ky nang ma hoi. hieu vu cham soc van ((hanh di) OR (hang di)) cua viet.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thu hoach)) ky nang ma hoi. hieu vu cham soc van ((hanh di) or (hang di)) cua viet*.