Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, nang cao, mang may
sang ma » tang ma, sang tao, mang may
hieu ve » hieu va, hieu van
cac xuc » cac nuoc, chat xuc, cac cuoc
va hanh » van hanh, va thanh, va danh
vi cua » vai cua, di cua
cua te » cua tu

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 ky ((nang ma) OR (sang ma)) hoa. hieu ve ((cac xuc) or (cam xuc)) va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky ((nang ma) OR (sang ma)) hoa. hieu ve ((cac xuc) OR (cam xuc)) va hanh vi cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky ((nang ma) OR (sang ma)) hoa. hieu ve ((cac xuc) or (cam xuc)) va hanh vi cua te*".