Perhaps you should try some spelling variations:
thuat anh » thuat lanh, thuat canh, thuat nganh
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
tan sach » ban sach, tay sach, tin sach
sach bai » sach dao, cac bai, sach xa
dua tren » dung tren
ly nang » ky nang, ly hang, ly vang
dao duc » giao duc, tao duoc
y nang » ky nang, v nang, may nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat anh ((y nang) OR (ly nang)) ma hoa. hieu van dao duc tan sach bai ((dua tren) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat anh ((y nang) OR (ly nang)) ma hoa. hieu van dao duc tan sach bai ((dua tren) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat anh ((y nang) OR (ly nang)) ma hoa. hieu van dao duc tan sach bai ((dua tren) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: thuat anh ((y nang) OR (ly nang)) ma hoa. hieu van dao duc tan sach bai ((dua tren) or (cua triet))*.