Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tuan ve » tuan le, quan ve, luan ve
vuc van » duc van, luc van, thuc van
xuc van » duc van, luc van, xuc ban
sach ty » sach y, sach tu, sach thu
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
qua cac » cua cac
ve cua » le cua, de cua, te cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty ((nang xa) or (nang ma)) hoi. hieu qua cac ((xuc van) OR (vuc van)) tuan ve cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((nang xa) OR (nang ma)) hoi. hieu qua cac ((xuc van) OR (vuc van)) tuan ve cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((nang xa) or (nang ma)) hoi. hieu qua cac ((xuc van) OR (vuc van)) tuan ve cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ty ((nang xa) or (nang ma)) hoi. hieu qua cac ((xuc van) OR (vuc van)) tuan ve cua triet*.