Perhaps you should try some spelling variations:
dung tren » dung trong, dung trung
cham thuc » nham thuc, pham thuc, tham thuc
thanh lap » thanh san, phan lap, thanh hai
va thanh » gia thanh, ban thanh, va tinh
nang tao » nang cao, sang tao, nang tai
tu sach » thu sach, su sach, te sach
thuc va » thuc vat, thuc dan, thuc day
sach ky » sac ky, sach y, sach ty
va cham » va chat, va tham
hieu va » lieu va, hieu qua
tao hoi » tao khoi, tao boi, tay hoi
cua te » cua tu

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 ky nang tao hoi. hieu va cham thuc va thanh lap ((((dua tren) OR (dung tren))) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang tao hoi. hieu va cham thuc va thanh lap ((((dua tren) OR (dung tren))) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang tao hoi. hieu va cham thuc va thanh lap ((((dua tren) OR (dung tren))) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang tao hoi. hieu va cham thuc va thanh lap ((((dua tren) OR (dung tren))) or (cua te))*.