Perhaps you should try some spelling variations:
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
te sach » toc sach
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
sach ty » sach y, sach tu, sach thu
tu truc » tu thuoc, tu trung
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang

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 truc) 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 truc) OR (cau truc)) ((van hanh) OR (ban hanh)) vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang xa hoi. hieu va ((tu truc) 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 truc) or (cau truc)) ((van hanh) OR (ban hanh)) vai cua tre*.