Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
thanh di » thanh doi, thanh de, thanh do
nang xa » nang x, lang xa, nang ma
hieu va » hieu qua
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
di cua » dai cua, doi cua, de cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach v nang xa hoi. ((hieu va) or (lieu va)) cam ((xuc va) OR (tuc va)) thanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach v nang xa hoi. ((hieu va) OR (lieu va)) cam ((xuc va) OR (tuc va)) thanh di cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach v nang xa hoi. ((hieu va) or (lieu va)) cam ((xuc va) OR (tuc va)) thanh di cua triet".
• Adding a wildcard symbol may retrieve word variants: toc sach v nang xa hoi. ((hieu va) or (lieu va)) cam ((xuc va) OR (tuc va)) thanh di cua triet*.