Perhaps you should try some spelling variations:
chua thuc » thuat thuc, chuan chuc, thuan thuc
hieu van » hieu va, thien van, lieu va
cua thuc » cua thuoc, qua thuc, rua thuc
dan hanh » dang hanh, dan khanh, dan thanh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hanh tu » anh tu, danh tu
cua tuc » cua duc, cua thuoc, luat tuc
cua tu » cua su, cua cu, cua te
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu van ((cua thuc) or (chua thuc)) dan hanh tu ((cua tu) or (cua tuc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. hieu van ((cua thuc) OR (chua thuc)) dan hanh tu ((cua tu) OR (cua tuc)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. hieu van ((cua thuc) or (chua thuc)) dan hanh tu ((cua tu) or (cua tuc))*.