Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
hang vai » hang tai, hang hai, hang vat
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hang vi » hanh vi, hang di, khang voi
cua tre » cua te, cuu tre, cua triet
du tan » duc tan, duy tan, du tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ty nang xa hoi. lieu va cac du tan ((((hang vai) OR (hang vi))) or (hang va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ty nang xa hoi. lieu va cac du tan ((((hang vai) OR (hang vi))) OR (hang va)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ty nang xa hoi. lieu va cac du tan ((((hang vai) OR (hang vi))) or (hang va)) cua tre".
• Adding a wildcard symbol may retrieve word variants: hoc sach ty nang xa hoi. lieu va cac du tan ((((hang vai) OR (hang vi))) or (hang va)) cua tre*.