Perhaps you should try some spelling variations:
thu lang » thu hang, phu lang, tho lang
thu bang » thu ban, thu hang, chu bang
su sach » so sach, vu sach
tinh vi » trinh vi, tinh voi, tinh va
thuc va » thuc dan, thuc day
ve nham » ve nha, ve cham
hieu ve » hieu va, hieu van
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((thu lang) or (thu bang)) xa hoi. hieu ve nham ((thuc va) OR (thuc vat)) tinh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((thu lang) OR (thu bang)) xa hoi. hieu ve nham ((thuc va) OR (thuc vat)) tinh vi cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((thu lang) or (thu bang)) xa hoi. hieu ve nham ((thuc va) OR (thuc vat)) tinh vi cua tu".
• Adding a wildcard symbol may retrieve word variants: su sach ((thu lang) or (thu bang)) xa hoi. hieu ve nham ((thuc va) OR (thuc vat)) tinh vi cua tu*.