Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
cham suc » cham soc, cham cuu, cao suc
manh han » manh hai, manh hon, anh han
cua tre » cua te, cuu tre, cua triet
han tai » hang tai, nhan tai, van tai
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
va cham » va chat, va tham

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 y ((nang xa) or (lang xa)) hoi. hieu va cham suc manh han tai ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang xa) OR (lang xa)) hoi. hieu va cham suc manh han tai ((cua tre) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang xa) or (lang xa)) hoi. hieu va cham suc manh han tai ((cua tre) or (su triet))*.