Perhaps you should try some spelling variations:
phuong dan » phuong danh, phuong doan, huong dan
manh trung » manh tung, thanh trung, manh hung
hieu lang » chieu sang, hieu quang, nhieu tang
trung vat » trung va, trung van, trong vat
hoc hieu » hoc thieu, hoc hien, doc hieu
vat bang » mat bang, va bang, van bang
dan than » dan chan, ban than, van than
than cap » khan cap, thanh lap, thanh cac

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 lang - manh trung vat bang phuong dan than cap~.
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - manh trung vat bang phuong dan than cap*.