Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
hieu van » hieu va, thien van, lieu va
hanh doi » thanh doi, hanh noi, hang doi
cham tuc » nham thuc, pham thuc, cham soc
doi cua » dai cua, hoi cua
va hanh » van hanh, va thanh, va danh
te sach » toc sach
sach ly » sach y, sach lo, sach ty
lai hoi » dai hoi, lai hoa, lai roi
ly nang » ky nang, ly hang, ly vang
cua tre » cua te, cuu tre, cua triet
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: te sach ly nang ((ma hoi) or (lai hoi)). hieu van ((cham tuc) or (tham thuc)) va hanh doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ly nang ((ma hoi) OR (lai hoi)). hieu van ((cham tuc) OR (tham thuc)) va hanh doi cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ly nang ((ma hoi) or (lai hoi)). hieu van ((cham tuc) or (tham thuc)) va hanh doi cua tre*.