Perhaps you should try some spelling variations:
cham viet » pham viet, cam viet, chat viet
manh hanh » xanh hanh, danh thanh, minh thanh
cham duc » cham soc, pham duy, phan duc
hanh lai » hanh lam, hanh tai, thanh lap
lai cham » lai chau, lai cam, lai chang
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu va » lieu va, hieu qua
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: tu sach ty nang x hoi. hieu va ((cham duc) or (pham duc)) manh hanh lai cham viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. hieu va ((cham duc) OR (pham duc)) manh hanh lai cham viet.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. hieu va ((cham duc) or (pham duc)) manh hanh lai cham viet*.