Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
tang van » dang van, hoang van, trong van
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
sach ky » sac ky, sach y, sach ty
sang ma » nang ma, sang tao, mang may
tang ma » mang may
van cac » van hac, van cau, van bac
dan van » dang van, doan van, dao van
vi cua » vai cua, di cua

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 ((sang ma) or (((tang ma) or (tang van)))) hoi. hieu van cac dan van hanh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky ((sang ma) OR (((tang ma) OR (tang van)))) hoi. hieu van cac dan van hanh vi cua vat.
• Adding a wildcard symbol may retrieve word variants: thuat sach ky ((sang ma) or (((tang ma) or (tang van)))) hoi. hieu van cac dan van hanh vi cua vat*.