Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
cham sac » cham soc, pham sach, cap sac
nang xa » nang x, lang xa, nang ma
sach tu » sach thu, cach tu, sach uu
sach ty » sach y, sach thu, xach tay
va cham » va chat, va tham
sac van » cac van, san van, sat van
cuu tre » cua tre, cau tren, cau treo
hieu va » lieu va, hieu qua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach ty) OR (sach tu)) nang xa hoi. hieu va cham sac van hanh vi ((cuu tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ty) OR (sach tu)) nang xa hoi. hieu va cham sac van hanh vi ((cuu tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ty) OR (sach tu)) nang xa hoi. hieu va cham sac van hanh vi ((cuu tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: thu ((sach ty) OR (sach tu)) nang xa hoi. hieu va cham sac van hanh vi ((cuu tre) or (cua triet))*.