Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
tru nang » tra nang, tri nang, truc nano
vu kham » vu khanh
tai cua » thai cua, tai cuc, tri cua
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
kham ly » khao ly, khanh ly
hieu vu » hieu va, hieu ve, hieu su
tu nang » tu nong, tu nano, tu lang
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ((tu nang) OR (tru nang)) ma hoi. hieu vu kham ly ((va hanh) or (va danh)) tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ((tu nang) OR (tru nang)) ma hoi. hieu vu kham ly ((va hanh) OR (va danh)) tai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ((tu nang) OR (tru nang)) ma hoi. hieu vu kham ly ((va hanh) or (va danh)) tai cua tre".
• Adding a wildcard symbol may retrieve word variants: thuat sach ((tu nang) OR (tru nang)) ma hoi. hieu vu kham ly ((va hanh) or (va danh)) tai cua tre*.