Perhaps you should try some spelling variations:
nam thuoc » nam thu, nha thuoc, cay thuoc
cau triet » cau trieu, su triet, cua triet
hoc sach » hoc sinh, hoc anh
nam thuc » am thuc, nam thu, nam tu
hoc cac » hoc cao
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu ha » hieu hoa, hieu va, hieu ca
dan vai » dan va, dan tai, dan vat
vai cau » va cau, van cau, vai cac
va dan » ca dan, va dao, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc sach) or (hoc cac)) ky lang xa hoi. hieu ha ((nam thuc) or (nam thuoc)) va dan vai cau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (hoc cac)) ky lang xa hoi. hieu ha ((nam thuc) OR (nam thuoc)) va dan vai cau triet.
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) or (hoc cac)) ky lang xa hoi. hieu ha ((nam thuc) or (nam thuoc)) va dan vai cau triet*.