Perhaps you should try some spelling variations:
thuat van » thuat san, thuat va, thuat ban
nam truc » nam truoc, nam thuc, nam trung
cua viet » ca viet, hoa viet, cua dieu
thanh di » thanh doi, thanh de, thanh do
va thanh » gia thanh, ban thanh, va tinh
cay phoi » cap phoi, tay hoi, cay cho
truc va » thuc va, thuc vat, trung va
hieu va » lieu va, hieu qua
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, gay thoi
va nam » van nam, ha nam, va nay

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat van ky dang ((xay hoi) or (cay phoi)). hieu va nam truc va thanh di ((cua viet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat van ky dang ((xay hoi) OR (cay phoi)). hieu va nam truc va thanh di ((cua viet) OR (cua vat)).
• Adding a wildcard symbol may retrieve word variants: thuat van ky dang ((xay hoi) or (cay phoi)). hieu va nam truc va thanh di ((cua viet) or (cua vat))*.