Perhaps you should try some spelling variations:
doan truc » doan trung, xuan truc, doan tu
dai truc » dai thuc, dai trung, cau truc
hanh doi » thanh doi, hanh noi, hang doi
van hanh » van thanh, ban hanh, van anh
dau truc » cau truc, dau tu, du tru
su sach » so sach, vu sach
doi cua » dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
sach ty » sach y, sach tu, sach thu
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: su sach ty nang xa hoi. lieu va ((dau truc) or (((dai truc) OR (doan truc)))) van hanh doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. lieu va ((dau truc) OR (((dai truc) OR (doan truc)))) van hanh doi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang xa hoi. lieu va ((dau truc) or (((dai truc) OR (doan truc)))) van hanh doi cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. lieu va ((dau truc) or (((dai truc) OR (doan truc)))) van hanh doi cua tre*.