Perhaps you should try some spelling variations:
thuat van » thuat san, thuat va, thuat ban
dang xay » dang van, van xay
cua viet » ca viet, hoa viet, cua dieu
thanh de » hanh de, thanh ve, thanh do
cam truc » cau truc, nam truc, lam truoc
thanh di » thanh doi, thanh do, thanh dinh
truc va » thuc va, thuc vat, trung va
ky dang » ky nang, ky danh
hieu va » lieu va, hieu qua
xay hoi » xa hoi, tay hoi, cay phoi
va cam » va cham, va cac, va cao

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. hieu va cam truc va ((thanh di) OR (thanh de)) ((cua viet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat van ky dang xay hoi. hieu va cam truc va ((thanh di) OR (thanh de)) ((cua viet) OR (cua vat)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat van ky dang xay hoi. hieu va cam truc va ((thanh di) OR (thanh de)) ((cua viet) or (cua vat))".
• Adding a wildcard symbol may retrieve word variants: thuat van ky dang xay hoi. hieu va cam truc va ((thanh di) OR (thanh de)) ((cua viet) or (cua vat))*.