Perhaps you should try some spelling variations:
tham thuc » pham thuc, tam thuc, thai thuc
phap thuc » phap thu, phap hoc, phap tu
nham thuc » nhan thuc, nam thuc, nham thu
hieu van » hieu va, thien van, lieu va
thanh ve » hanh ve, thanh va, thanh vien
va thanh » gia thanh, ban thanh, va tinh
cuu tre » cua tre, cau tren, cau treo
nang ma » tang ma, sang ma, nang cao
ve cuu » ve cau, ve chu, ve cua
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky nang ma hoi. hieu van ((tham thuc) OR (((phap thuc) OR (nham thuc)))) va thanh ve cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky nang ma hoi. hieu van ((tham thuc) OR (((phap thuc) OR (nham thuc)))) va thanh ve cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sai ky nang ma hoi. hieu van ((tham thuc) OR (((phap thuc) OR (nham thuc)))) va thanh ve cuu tre*.