Perhaps you should try some spelling variations:
nha thuoc » nha nuoc, nhan thuc, nha hoc
nhanh hai » nhanh thai, thanh hai, nhanh ha
dan nhanh » dan hanh, dan khanh, dan thanh
thuoc dan » thuoc dang, thuc dan, thuoc ban
cua viet » ca viet, hoa viet, cua vat
toc sach » hoc sach, doc sach, thuoc sach
nang hoa » nang hoat, hang hoa, nang hoc
hai cua » thai cua, dai cua, hoi cua
hoa hoi » khoa hoi, hoa hoc, hoa doi
hieu he » hiem he, hieu le, hieu hien
hieu ve » hieu va, hieu van
te sac » te sach, te cac, te san

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sac) or (toc sach)) ky nang hoa hoi. ((hieu he) or (hieu ve)) nha thuoc dan nhanh hai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (toc sach)) ky nang hoa hoi. ((hieu he) OR (hieu ve)) nha thuoc dan nhanh hai cua viet.
• Adding a wildcard symbol may retrieve word variants: ((te sac) or (toc sach)) ky nang hoa hoi. ((hieu he) or (hieu ve)) nha thuoc dan nhanh hai cua viet*.