Perhaps you should try some spelling variations:
xach tay » canh tay
yen cua » ben cua, gen cua, men cua
dan yen » danh yen, van yen, dan den
cac tac » cac toc, cac bac, cac dac
hieu va » lieu va, hieu qua
cao hoi » cau hoi, co hoi, cao hoc
cach tu » cach thuc
sach tu » sach thu, sach ty, sach uu
cua tre » cua te, cuu tre, cua triet
tac va » tac da, tac xa, tuc va
va dan » ca dan, va dao, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((xach tay) or (((sach tu) OR (cach tu)))) nang cao hoi. hieu va cac tac va dan yen cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((xach tay) OR (((sach tu) OR (cach tu)))) nang cao hoi. hieu va cac tac va dan yen cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((xach tay) or (((sach tu) OR (cach tu)))) nang cao hoi. hieu va cac tac va dan yen cua tre".
• Adding a wildcard symbol may retrieve word variants: te ((xach tay) or (((sach tu) OR (cach tu)))) nang cao hoi. hieu va cac tac va dan yen cua tre*.