Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
han thai » han tai, ban thai, van thai
thai va » thai van
cau tuc » cau truc, cau tu, cau luc
van cau » van dau, van hau, van chat
tu sach » thu sach, su sach, te sach
ty hang » ly hang, ty xang, thi hang
ty nang » ky nang, ty xang, ly nang
tuc va » thuc va, truc va, tuc xa
va han » va phan, van han, va hanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((ty nang) OR (ty hang)) xa hoi. hieu van cau tuc va han thai va (thiet or thieu)~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ty hang)) xa hoi. hieu van cau tuc va han thai va (thiet OR thieu).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) OR (ty hang)) xa hoi. hieu van cau tuc va han thai va (thiet or thieu)".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) OR (ty hang)) xa hoi. hieu van cau tuc va han thai va (thiet or thieu)*.