Perhaps you should try some spelling variations:
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
qua cam » qua cham, qua cac, qua ca
truc va » trung va
thuc va » thuc dan, thuc day
danh vi » hanh vi, dinh vi, danh di
x hoi » xa hoi, o hoi, x ho
vi va » vi van, vai va, vu va
thiet » thieu

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 x hoi. hieu qua cam ((truc va) or (((thuc va) OR (thuc vat)))) danh vi va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly nang x hoi. hieu qua cam ((truc va) OR (((thuc va) OR (thuc vat)))) danh vi va thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ly nang x hoi. hieu qua cam ((truc va) or (((thuc va) OR (thuc vat)))) danh vi va thiet".
• Adding a wildcard symbol may retrieve word variants: su sach ly nang x hoi. hieu qua cam ((truc va) or (((thuc va) OR (thuc vat)))) danh vi va thiet*.