Perhaps you should try some spelling variations:
dua tren » dung tren
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
va chat » van chat, va phat, hoa chat
va dinh » van dinh, va kinh, va tinh
dinh vi » dinh ve, dinh viet, dinh tri
tuc va » thuc va, truc va, tuc xa
vi dua » vi du, vi dum, vi lua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty nang xa hoi. hieu ((va chat) or (cao chat)) tuc va dinh vi dua tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. hieu ((va chat) OR (cao chat)) tuc va dinh vi dua tren.
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. hieu ((va chat) or (cao chat)) tuc va dinh vi dua tren*.