Perhaps you should try some spelling variations:
hau truc » hang truc, hoc truc, tu truc
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hai cua » thai cua, dai cua, hoi cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang xa hoi. lieu va ((hau truc) OR (cau truc)) ((van hanh) or (gia thanh)) hai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. lieu va ((hau truc) OR (cau truc)) ((van hanh) OR (gia thanh)) hai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. lieu va ((hau truc) OR (cau truc)) ((van hanh) or (gia thanh)) hai cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. lieu va ((hau truc) OR (cau truc)) ((van hanh) or (gia thanh)) hai cua te*.