Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
truc ban » thuc ban, truc dan, truc van
chu treo » cau treo, cau tren, chu tri
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
cu tren » tu tren, dua tren
sach ly » sach y, sach lo, sach ty
tuc ban » thuc ban, tu ban, tuc dan
nang ma » tang ma, sang ma, nang cao
ly nang » ky nang, ly hang, ly vang
ma hoi » mai hoi, xa hoi, ma hoa

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 ly nang ma hoi. hieu van nam ((tuc ban) or (truc ban)) thanh hai ((chu treo) OR (cu tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly nang ma hoi. hieu van nam ((tuc ban) OR (truc ban)) thanh hai ((chu treo) OR (cu tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ly nang ma hoi. hieu van nam ((tuc ban) or (truc ban)) thanh hai ((chu treo) OR (cu tren))".
• Adding a wildcard symbol may retrieve word variants: su sach ly nang ma hoi. hieu van nam ((tuc ban) or (truc ban)) thanh hai ((chu treo) OR (cu tren))*.