Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
cau tren » cu tren, dau tren, ca tren
van hanh » van thanh, ban hanh, van anh
van danh » van doanh, van anh, van manh
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
cuu tre » cua tre, cau treo
tu sach » thu sach, su sach, te sach
cua lo » cua lao, cua loc, cua lop

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 ty nang xa hoi. hieu viec cua lo ((van danh) or (van hanh)) vai ((cuu tre) OR (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang xa hoi. hieu viec cua lo ((van danh) OR (van hanh)) vai ((cuu tre) OR (cau tren))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang xa hoi. hieu viec cua lo ((van danh) or (van hanh)) vai ((cuu tre) OR (cau tren))*".