Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
hieu van » hieu va, thien van, lieu va
manh han » manh hai, manh hon, anh han
lang xa » lang ha, dang xay, lang van
van cam » van nam, van lam, van cau
cam suc » cam xuc, cao suc, cham soc
sach ky » sac ky, sach y, sach ty
han tai » hang tai, nhan tai, van tai
cua tre » cua te, cuu tre, dua tren
ky lang » ky nang, ky dang, ky tang
tu sach » thu sach, su sach, te sach

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 ky lang xa hoi. hieu van cam suc manh han tai ((cua tre) or (((cua triet) OR (va triet))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang xa hoi. hieu van cam suc manh han tai ((cua tre) OR (((cua triet) OR (va triet)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky lang xa hoi. hieu van cam suc manh han tai ((cua tre) or (((cua triet) OR (va triet))))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang xa hoi. hieu van cam suc manh han tai ((cua tre) or (((cua triet) OR (va triet))))*.