Perhaps you should try some spelling variations:
thuat sach » thuat san
thuat lanh » thuat lap, thuat san
day thanh » dao thanh, dat thanh, da thanh
cau thuc » cau truc, cuu thuc, can thuc
thanh di » thanh doi, thanh de, thanh do
thuc day » thuc dan, thuc vat
nang xa » nang x, lang xa, nang ma
hieu ve » hieu van
hieu va » lieu va, hieu qua
di cua » dai cua, doi cua, de cua
cua te » cua tu
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuat sach) OR (thuat lanh)) y nang xa hoi. ((hieu ve) or (hieu va)) cau thuc day thanh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuat sach) OR (thuat lanh)) y nang xa hoi. ((hieu ve) OR (hieu va)) cau thuc day thanh di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuat sach) OR (thuat lanh)) y nang xa hoi. ((hieu ve) or (hieu va)) cau thuc day thanh di cua te".
• Adding a wildcard symbol may retrieve word variants: ((thuat sach) OR (thuat lanh)) y nang xa hoi. ((hieu ve) or (hieu va)) cau thuc day thanh di cua te*.