Perhaps you should try some spelling variations:
tra nang » thi nang, kha nang, da nang
hieu van » hieu va, thien van, lieu va
hanh hai » thanh hai, nhanh hai, hang hai
hai chau » lai chau, ha chau, hat chau
chau tho » chat thom, cau thi, phu tho
vu sach » vu bach, su sach, vu khach
tu nong » tu dong, tu cong, tu tong
van cam » van nam, van lam, van cau
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ((tu nong) or (tra nang)) xa hoi. hieu van cam ((xuc van) OR (duc van)) hanh hai chau tho~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((tu nong) OR (tra nang)) xa hoi. hieu van cam ((xuc van) OR (duc van)) hanh hai chau tho*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ((tu nong) or (tra nang)) xa hoi. hieu van cam ((xuc van) OR (duc van)) hanh hai chau tho*".