Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
cham tuc » nham thuc, pham thuc, cham soc
hanh doi » thanh doi, hanh noi, hang doi
sach ly » sach lo, sach ty, sach hay
doi cua » dai cua, hoi cua
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
vang xa » lang xa, mang xa, ang xa
cua tre » cua te, cuu tre, cua triet

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) OR (sach y)) vang xa hoi. hieu ve ((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) OR (sach y)) vang xa hoi. hieu ve ((cham tuc) OR (tham thuc)) va hanh doi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ly) OR (sach y)) vang xa hoi. hieu ve ((cham tuc) or (tham thuc)) va hanh doi cua tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach ly) OR (sach y)) vang xa hoi. hieu ve ((cham tuc) or (tham thuc)) va hanh doi cua tre*.