Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
truong cao » truong dai
hien sach » dien sach, kien sach, chieu sach
trung cap » trung tam
hang cong » dang cong, hang nong, bang cong
cong tan » cong tac, cong san, cong thanh
tran cap » than cap, tranh chap, tran chau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien sach) OR (thien hach)) - thanh ((trung cap) or (truong cao)) hang cong tan tran cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien sach) OR (thien hach)) - thanh ((trung cap) OR (truong cao)) hang cong tan tran cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien sach) OR (thien hach)) - thanh ((trung cap) or (truong cao)) hang cong tan tran cap".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien sach) OR (thien hach)) - thanh ((trung cap) or (truong cao)) hang cong tan tran cap*.