Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
chat truc » cau truc, chat xuc
su triet » su viet, su tien, ve triet
hoc cac » hoc cao
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
truc va » thuc va, thuc vat, trung va
va danh » va dinh, va dan, va hanh
danh di » danh du, xanh di, danh dien
di su » doi su, ki su, da 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 cac)) ky ((nang xa) OR (nang ma)) hoi. hieu va chat truc va danh di su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (hoc cac)) ky ((nang xa) OR (nang ma)) hoi. hieu va chat truc va danh di su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) or (hoc cac)) ky ((nang xa) OR (nang ma)) hoi. hieu va chat truc va danh di su triet".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (hoc cac)) ky ((nang xa) OR (nang ma)) hoi. hieu va chat truc va danh di su triet*.