Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cham sac » cham soc, pham sach, cham mat
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cuu tre » cua tre, cau tren, cau treo

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

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