Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thuc van » thuc vat, thuc dan, thuc va
cau thuc » cau truc, cuu thuc, can thuc
sach ly » sach y, sach lo, sach ty
hanh va » hanh vi
cuu tre » cua tre, cau tren, cau treo
hieu va » lieu va, hieu qua
hieu ve » hieu van
cao hoi » cau hoi, co hoi, cao hoc
ly nang » ky nang, ly hang, ly vang

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 ly nang cao hoi. ((hieu ve) or (hieu va)) cau thuc van ((hanh va) OR (hang va)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ly nang cao hoi. ((hieu ve) OR (hieu va)) cau thuc van ((hanh va) OR (hang va)) cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ly nang cao hoi. ((hieu ve) or (hieu va)) cau thuc van ((hanh va) OR (hang va)) cuu tre*".