Perhaps you should try some spelling variations:
minh thanh » dinh thanh, tinh thanh, hinh thanh
manh hanh » xanh hanh, danh thanh, manh huynh
dua tren » dung tren
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cao suc » cao su, cao duc
y nang » ky nang, ly nang, v nang
ve cao » va cao, ve bao, ve cac
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 y nang xa hoi. hieu ve cao suc ((manh hanh) OR (minh thanh)) tai ((dua tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu ve cao suc ((manh hanh) OR (minh thanh)) tai ((dua tren) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. hieu ve cao suc ((manh hanh) OR (minh thanh)) tai ((dua tren) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu ve cao suc ((manh hanh) OR (minh thanh)) tai ((dua tren) or (cua te))*.