Perhaps you should try some spelling variations:
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
truc va » thuc vat, trung va
thuc va » thuc vat, thuc dan, thuc day
luu tre » luu tru, cuu tre, luy tre
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam
vi luu » 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 y nang xa hoi. hieu ve cam ((duc va) or (((truc va) OR (thuc va)))) hanh vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu ve cam ((duc va) OR (((truc va) OR (thuc va)))) hanh vi luu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang xa hoi. hieu ve cam ((duc va) or (((truc va) OR (thuc va)))) hanh vi luu tre".
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu ve cam ((duc va) or (((truc va) OR (thuc va)))) hanh vi luu tre*.