Perhaps you should try some spelling variations:
tan hanh » tan thanh, tang hanh, toan hanh
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cham » va chat, va tham
soc tan » hoc tan, so tan, soc dan
cua tre » cua te, cuu tre, cua triet

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 (te sach)) ky nang xa hoi. hieu va cham soc tan hanh vi ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (te sach)) ky nang xa hoi. hieu va cham soc tan hanh vi ((cua tre) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (te sach)) ky nang xa hoi. hieu va cham soc tan hanh vi ((cua tre) or (su triet))*.