Perhaps you should try some spelling variations:
tinh tra » tinh tri, tinh trang, tinh toan
tu sach » thu sach, te sach, tu cach
tra cua » trau cua, trua cua, tra cuu
va tinh » may tinh
dao xuc » dao duc, dao tuc, dao xu
qua dao » lua dao, qua da, cua dao
ky tang » ky nang, ky dang, kho tang
ky lang » ky nang, ky dang, tay lang
su sach » so sach, vu sach
xuc va » duc va, tuc va, luc va
cua tu » cua tuc, cua su, cua cu

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) or (su sach)) ((ky lang) OR (ky tang)) xa hoi. hieu qua dao xuc va tinh tra cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ((ky lang) OR (ky tang)) xa hoi. hieu qua dao xuc va tinh tra cua tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ((ky lang) OR (ky tang)) xa hoi. hieu qua dao xuc va tinh tra cua tu*".