Perhaps you should try some spelling variations:
thuat lanh » thuat lap, thuat san
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
lanh ky » hanh ky, nganh ky, thanh ky
nang ma » tang ma, sang ma, nang cao
cac dac » cac dan, cac bac, cac tac
cac dai » cac dan, cac bai, can dai
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 lanh ky nang ma hoi. hieu van ((((cac dac) or (cai dat))) or (cac dai)) van hanh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat lanh ky nang ma hoi. hieu van ((((cac dac) OR (cai dat))) OR (cac dai)) van hanh vi cua vat.
• Adding a wildcard symbol may retrieve word variants: thuat lanh ky nang ma hoi. hieu van ((((cac dac) or (cai dat))) or (cac dai)) van hanh vi cua vat*.