Perhaps you should try some spelling variations:
thuoc sach » nuoc sach, thuat sach, thuoc sinh
thanh vai » thanh hai, thanh van, thanh tai
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
hoc sach » hoc sinh, hoc cac, hoc anh
su triet » su viet, su tien, ve triet
lang xa » lang ha, dang xay, lang van
van cac » van hac, van cau, van bac
cac loc » cac lop, cac toc, cac hoc
loc va » hoc va, luc va
vai su » va su, van su, lai su

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc sach) OR (hoc sach)) ky ((nang x) or (lang xa)) hoi. hieu van cac loc va thanh vai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (hoc sach)) ky ((nang x) OR (lang xa)) hoi. hieu van cac loc va thanh vai su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) OR (hoc sach)) ky ((nang x) or (lang xa)) hoi. hieu van cac loc va thanh vai su triet".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) OR (hoc sach)) ky ((nang x) or (lang xa)) hoi. hieu van cac loc va thanh vai su triet*.