Perhaps you should try some spelling variations:
hoach dat » hoach xay, hoc dat, hoach va
thuat lap » thuat lanh, thuat xay, thuat bai
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
nang ma » tang ma, sang ma, nang cao
hac dat » hoc dat, tac dat, nhac dan
lap ky » lap ke, tap ky, lap ly
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 lap ky nang ma hoi. hieu van ((hac dat) OR (hoach dat)) van hanh vi cua vat~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat lap ky nang ma hoi. hieu van ((hac dat) OR (hoach dat)) van hanh vi cua vat".
• Adding a wildcard symbol may retrieve word variants: thuat lap ky nang ma hoi. hieu van ((hac dat) OR (hoach dat)) van hanh vi cua vat*.