Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
cham tuc » nham thuc, tham thuc, cham soc
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
va hang » van hang, va nang, va lang
hang vi » hang va, hanh vi, hang di
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho

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 tu nang x hoi. hieu qua ((cham tuc) OR (pham thuc)) va hang vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tu nang x hoi. hieu qua ((cham tuc) OR (pham thuc)) va hang vi cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach tu nang x hoi. hieu qua ((cham tuc) OR (pham thuc)) va hang vi cua tre*.