Perhaps you should try some spelling variations:
vat thanh » dat thanh, gat thanh, tat thanh
cam thuc » am thuc, nam thuc, cam thu
thanh vi » hanh vi, thanh va, thanh ve
tu sach » thu sach, su sach, tu cach
te sach » toc sach
cao hoc » co hoc, cho hoc, chat hoc
su tien » su kien, su hien, tu tieng
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao
vi su » va su, ve su, ki su

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 (te sach)) y nang cao hoc. lieu va cam thuc vat thanh vi su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) y nang cao hoc. lieu va cam thuc vat thanh vi su tien.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) y nang cao hoc. lieu va cam thuc vat thanh vi su tien*.