Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
phong tham » phong kham, chong tham, hong tham
tham lang » nham nang, pham hang, thai bang
lang cong » dang cong, bang cong, hang cong
hieu cac » hieu luc, hieu va, hieu van
cong van » cong vang, cong san, song van
van hang » van khang, van hoang, van thang
hang ca » hang va, nang cao, hang tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu cac) OR (chieu sach)) - khanh phong tham lang cong van hang ca~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu cac) OR (chieu sach)) - khanh phong tham lang cong van hang ca".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu cac) OR (chieu sach)) - khanh phong tham lang cong van hang ca*.