Perhaps you should try some spelling variations:
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
luu tre » cuu tre, luy tre
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
ly nang » ky nang, ly hang, ly vang
ve cam » ve cham, ve cac, va cam
ma hoi » mai hoi, xa hoi, ma hoa
tru » truc

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 ly nang ma hoi. hieu ve cam ((duc va) or (thuc va)) hanh vi ((luu tre) or (luu tru))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly nang ma hoi. hieu ve cam ((duc va) OR (thuc va)) hanh vi ((luu tre) OR (luu tru)).
• Adding a wildcard symbol may retrieve word variants: su sach ly nang ma hoi. hieu ve cam ((duc va) or (thuc va)) hanh vi ((luu tre) or (luu tru))*.