Perhaps you should try some spelling variations:
cach thuc » anh thuc, cac thu
ngang cho » nang cho, ngang tho, sang cho
cach tru » cac tru, cach tieu, sach truc
van tuan » van quan, van ban, anh tuan
tuan vi » quan vi, luan vi, quans vi
duc van » duc va, duc tan, duc manh
cac duc » cac du, cao duc, cac dac
hieu ve » hieu va, hieu van
cho hoc » co hoc, khoa hoc
cua cau » cua cac, cua chu, cua cay
ve cac » va cac, vien cac
vi cua » vai cua, di 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 ((((cach tru) OR (cach thuc))) or (cach tu)) ngang cho hoc. hieu ve cac duc van tuan vi cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((((cach tru) OR (cach thuc))) OR (cach tu)) ngang cho hoc. hieu ve cac duc van tuan vi cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((((cach tru) OR (cach thuc))) or (cach tu)) ngang cho hoc. hieu ve cac duc van tuan vi cua cau*".