Perhaps you should try some spelling variations:
thu san » thuy san, thu ban, phu san
hanh va » hang va, hanh vi
hieu va » lieu va, hieu qua
cuu tre » cua tre, cau tren, cau treo
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
loc va » luc va
tu ban » thu ban, te ban
va cuu » va cau, va chu, va huu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu san) or (tu ban)) ky nang ma hoi. hieu va cac ((loc va) OR (hoc va)) hanh va cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu san) OR (tu ban)) ky nang ma hoi. hieu va cac ((loc va) OR (hoc va)) hanh va cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu san) or (tu ban)) ky nang ma hoi. hieu va cac ((loc va) OR (hoc va)) hanh va cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((thu san) or (tu ban)) ky nang ma hoi. hieu va cac ((loc va) OR (hoc va)) hanh va cuu tre*.