Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
xanh hanh » danh thanh, ban hanh, van hanh
dua tren » dung tren
hanh tai » thanh tai, hang tai, han tai
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cao suc » cao su
sach ky » sac ky, sach y, sach ty
cao duc » dao duc, giao duc, tao duoc
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: thuat sach ky nang xa hoi. hieu ve ((cao suc) OR (cao duc)) xanh hanh tai ((dua tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky nang xa hoi. hieu ve ((cao suc) OR (cao duc)) xanh hanh tai ((dua tren) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky nang xa hoi. hieu ve ((cao suc) OR (cao duc)) xanh hanh tai ((dua tren) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: thuat sach ky nang xa hoi. hieu ve ((cao suc) OR (cao duc)) xanh hanh tai ((dua tren) or (cua te))*.