Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
cac luoc » cac nuoc, cac quoc, cac lop
cac cuoc » cac nuoc, ca cuoc, cac quoc
minh vai » minh hai, minh ai, minh lai
sach ky » sac ky, sach y, sach ty
cao hoc » co hoc, cho hoc, chat hoc
minh va » tinh va, sinh va, sinh vat
cua cau » cua cac, cua chu, cua cay

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky nang cao hoc. lieu va ((cac luoc) OR (cac cuoc)) van ((minh vai) or (minh va)) cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang cao hoc. lieu va ((cac luoc) OR (cac cuoc)) van ((minh vai) OR (minh va)) cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky nang cao hoc. lieu va ((cac luoc) OR (cac cuoc)) van ((minh vai) or (minh va)) cua cau*".