Perhaps you should try some spelling variations:
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
tu trung » tu trong, su trung, tru truong
te sach » toc sach
vai cua » dai cua, hai cua, lai cua
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
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: te sach ty nang xa hoi. hieu va ((tu trung) or (cau truc)) ((van hanh) or (ban hanh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang xa hoi. hieu va ((tu trung) OR (cau truc)) ((van hanh) OR (ban hanh)) vai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ty nang xa hoi. hieu va ((tu trung) or (cau truc)) ((van hanh) or (ban hanh)) vai cua tre*.