Perhaps you should try some spelling variations:
truong doi » trong doi, truong hoi, truong moi
hoc sach » hoc sinh, hoc cac, hoc anh
hieu va » lieu va, hieu qua
so sach » so sanh, bo sach, co sach
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet
nang o » nang co, nang ho, nang ro
cac tu » cac thu, cach tu, cac du
o hoi » co hoi, o hoc, o hai
tu xa » tu xay, tu va, te xa

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

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