Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
cham tuc » nham thuc, tham thuc, cham soc
hang vi » hang va, hanh vi, hang di
va hang » van hang, va nang, va lang
sach tu » sach thu, cach tu, sach uu
sach ty » sach y, sach thu, xach tay
cuu tre » cua tre, cau tren, cau treo
vi cuu » vi luu, vinh cuu
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) OR (sach ty)) nang x hoi. hieu qua ((cham tuc) or (pham thuc)) va hang vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach tu) OR (sach ty)) nang x hoi. hieu qua ((cham tuc) OR (pham thuc)) va hang vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach tu) OR (sach ty)) nang x hoi. hieu qua ((cham tuc) or (pham thuc)) va hang vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach tu) OR (sach ty)) nang x hoi. hieu qua ((cham tuc) or (pham thuc)) va hang vi cuu tre*.