Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
cham xuc » chat xuc, cham soc, pham duc
hieu va » lieu va, hieu qua
tu sach » thu sach, su sach, te sach
hieu ve » hieu van
lang xa » lang ha, dang xay, lang van
y lang » o lang, _ lang, tay lang
va dau » va dao
dau de » dau ve, dai de, sau de
de su » den su, ve su, de tu

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 lang xa hoi. ((hieu ve) OR (hieu va)) ((cham xuc) or (cam xuc)) va dau de su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y lang xa hoi. ((hieu ve) OR (hieu va)) ((cham xuc) OR (cam xuc)) va dau de su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y lang xa hoi. ((hieu ve) OR (hieu va)) ((cham xuc) or (cam xuc)) va dau de su triet".
• Adding a wildcard symbol may retrieve word variants: tu sach y lang xa hoi. ((hieu ve) OR (hieu va)) ((cham xuc) or (cam xuc)) va dau de su triet*.