Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
phan lap » phan dau
vat phan » va phan, van phan, sat phan
dau thuc » dan thuc, dai thuc, dam thuc
lap cua » lai cua, tap cua, lam cua
tu sach » thu sach, te sach, tu cach
nang ho » nang hoc, nang co, tang ho
ty nang » ky nang, ty xang, ty hang
su sach » so sach, vu sach
hieu va » lieu va
ho hoi » hoc hoi, hoa hoi, hoi hoi

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)) ty nang ho hoi. ((hieu va) or (hieu qua)) dau thuc vat phan lap cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ty nang ho hoi. ((hieu va) OR (hieu qua)) dau thuc vat phan lap cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ty nang ho hoi. ((hieu va) or (hieu qua)) dau thuc vat phan lap cua viet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ty nang ho hoi. ((hieu va) or (hieu qua)) dau thuc vat phan lap cua viet*.