Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
doanh va » doan va, doanh tai, doanh cua
hoc mac » hoc ma, hoc may, hoc cac
danh va » hanh va, anh va, dan va
ca tren » cau tren, cu tren, la tren
thuc va » thuc vat, thuc day
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
mac ky » cac ky, sac ky, bac ky
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: hoc mac ky nang xa hoi. hieu va cuu ((thuc va) or (thuc dan)) ((danh va) OR (doanh va)) ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc mac ky nang xa hoi. hieu va cuu ((thuc va) OR (thuc dan)) ((danh va) OR (doanh va)) ca tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc mac ky nang xa hoi. hieu va cuu ((thuc va) or (thuc dan)) ((danh va) OR (doanh va)) ca tren".
• Adding a wildcard symbol may retrieve word variants: hoc mac ky nang xa hoi. hieu va cuu ((thuc va) or (thuc dan)) ((danh va) OR (doanh va)) ca tren*.