Perhaps you should try some spelling variations:
doc sach » hoc sach, toc sach, nuoc sach
te sach » toc sach
hanh de » hanh ve, hanh kem
va hanh » van hanh, va thanh, va danh
va chat » van chat, va phat, cao chat
va cham » va tham
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
soc va » hoc va, loc va, doc va
de cua » le cua, te cua, dieu cua
cua te » cua tu

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 (doc sach)) ty nang xa hoi. hieu ((va cham) OR (va chat)) soc va hanh de cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (doc sach)) ty nang xa hoi. hieu ((va cham) OR (va chat)) soc va hanh de cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (doc sach)) ty nang xa hoi. hieu ((va cham) OR (va chat)) soc va hanh de cua te".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (doc sach)) ty nang xa hoi. hieu ((va cham) OR (va chat)) soc va hanh de cua te*.