Perhaps you should try some spelling variations:
thu ban » thu hang
danh va » doanh va, hanh va, anh va
va danh » va dinh, va dan, va hanh
cac lop » cac hop, cac loai
hieu va » lieu va, hieu qua
cac loc » cac toc, cac hoc, cac nuoc
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
tu ban » te ban
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu ban) or (tu ban)) ky nang ma hoi. hieu va ((cac loc) or (cac lop)) va danh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu ban) OR (tu ban)) ky nang ma hoi. hieu va ((cac loc) OR (cac lop)) va danh va cua tre.
• Adding a wildcard symbol may retrieve word variants: ((thu ban) or (tu ban)) ky nang ma hoi. hieu va ((cac loc) or (cac lop)) va danh va cua tre*.