Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thien van » thi van
van hanh » van thanh, ban hanh, van anh
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang ma » tang ma, sang ma, nang cao
cac dat » cac dan, cac dai, cac dac
ma hoi » mai hoi, xa hoi, ma hoa
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 ty nang ma hoi. thien van ((((cac dat) or (cai dat))) or (cac bai)) van hanh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ty nang ma hoi. thien van ((((cac dat) OR (cai dat))) OR (cac bai)) van hanh vi cua vat.
• Adding a wildcard symbol may retrieve word variants: thuat sach ty nang ma hoi. thien van ((((cac dat) or (cai dat))) or (cac bai)) van hanh vi cua vat*.