Perhaps you should try some spelling variations:
chat thuc » thuat thuc, nhan thuc, chat thai
hieu cac » hieu luc, hieu va, hieu van
danh dau » lanh dao, hang dau, danh tu
vat danh » va danh, van danh, luat danh
hieu cao » chieu cao, hieu ca, kieu cao
tu sach » thu sach, te sach, tu cach
dau cua » dai cua, day cua, cau cua
cua tre » cua te, cuu tre, cua triet
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
su sach » so sach, vu sach

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)) ky lang xa hoi. ((hieu cao) or (hieu cac)) chat thuc vat danh dau cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky lang xa hoi. ((hieu cao) OR (hieu cac)) chat thuc vat danh dau cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky lang xa hoi. ((hieu cao) or (hieu cac)) chat thuc vat danh dau cua tre*.