Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
lang cho » sang cho, hang cho, lang co
van hanh » van thanh, ban hanh, van anh
chat duc » chat xuc, chat doc, chet duoc
te cach » ve cach, te sach, tu cach
duc van » duc va, duc tan, duc manh
lai cua » dai cua, hai cua, lai chau
hieu va » lieu va
cach tu » cach thuc
hieu ve » hieu van
cho hoc » co hoc, khoa hoc
tu lang » cu lang, tu lanh, xu lang

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 tu lang cho hoc. ((hieu ve) or (((hieu va) OR (hieu qua)))) chat duc van hanh lai cua cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cach tu lang cho hoc. ((hieu ve) OR (((hieu va) OR (hieu qua)))) chat duc van hanh lai cua cac*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cach tu lang cho hoc. ((hieu ve) or (((hieu va) OR (hieu qua)))) chat duc van hanh lai cua cac*".